pitchfx catalog


Finally! The new PITCHf/x article archive, now powered by a back-end database thanks to Bryan Donovan, is available at the Hardball Times.

You can read all about it here.

Last year I diligently kept a catalog of articles written about topics related to PITCHf/x or using PITCHf/x data. Some of you have noticed that I have been negligent in updating that catalog this year. My last full update was January 15, and I did a partial update on March 1.

A new update is now in progress behind the scenes. Since the article list now exceeds six hundred articles, I’m working toward a database solution to better track them all. Hopefully, I’ll be able to unveil something within the next few weeks. In the mean time, Harry, if you would quit writing more than an article per day, that would help a lot. I should just rename my catalog the Cubs f/x Index. ;)

The updated version of this catalog is now hosted by The Hardball Times.

In the spirit of better organization, here is the Enhanced Gameday analysis catalog organized by pitcher for those articles written about a particular pitcher.

You can also see the full list of articles by date, and articles by author.

Bronson Arroyo

  • On September 17, Harry Pavlidis published “Arroyo Clusters“, an article classifying pitch types for Bronson Arroyo.
  • On September 19, Justin inAZ published “PITCHf/x Plots for Harang and Arroyo“, an article discussing pitch classification plots for pitchers Aaron Harang and Bronson Arroyo.

Jose Ascanio

  • On December 6, Harry Pavlidis published “Jose Ascanio“, an article characterizing pitches for Jose Ascanio.

Homer Bailey

Dan Barone

  • On September 25, Harry Pavlidis published “Up Next: Dan Barone“, an article about pitch Dan Barone, examining his pitch types using spin rate graphs.

Josh Beckett

  • On June 14, Joe P. Sheehan published “Ch-ch-ch-ch-changes…”, on the effectiveness of the changeup and pitchers Cole Hamels, Josh Beckett, Trevor Hoffman, and Johan Santana.
  • On June 26, a Chinese-language article was published about pitcher Josh Beckett: http://blog.xuite.net/stfo/blog/12293879
  • On September 16, Whither published “Gameday Pearl Radar” (Google translation of the title, sorry!), a Chinese-language article about pitch classification for Andy Pettitte, Daisuke Matsuzaka, Chien-Ming Wang, Josh Beckett, Roger Clemens, and Curt Schilling. The graphs are in English, so you might get something out of the article even if you can’t read Chinese.
  • On October 4, Eric Van and Alan Nathan posted a breakdown of Josh Beckett’s October 3rd playoff start to the Sons of Sam Horn message board. See posts #64, #92, and #93.
  • On October 12, Joe P. Sheehan published “Beckett vs. Sabathia“, an article classifying pitches and examining pitching strategies for Josh Beckett and C.C. Sabathia.
  • On October 19, Joe P. Sheehan published “Pitch Sequencing“, an article examining pitch sequences for Josh Beckett, C.C. Sabathia, and Greg Maddux.
  • On October 19, Jonathan Hale published “Beckett’s Gem Keeps Boston Alive“, an article about Josh Beckett’s American League Championship Series Game 5 start.
  • On October 24, SoxScout posted a pitch characterization for Josh Beckett’s World Series Game 1 start to the Sons of San Horn message board. See post #18.
  • On November 6, I published “Bend It like Beckett“, an article classifying pitches for Josh Beckett.
  • On November 12, I published “Meanwhile, Beckett the Ranch…“, an article with strike zone charts by pitch type for Josh Beckett.

Erik Bedard

Matt Belisle

  • On September 14, Josh Kalk published “Reds @ Brewers Pitching Preview“, an article applying his pitch classification algorithm to Tom Shearn, Kirk Saarloos, Matt Belisle, Ben Sheets, Jeff Suppan, and Carlos Villanueva.

Joaquin Benoit

  • On August 16, Steve West published “Passing Out POTY Ballots”, an article about choosing the Rangers’ best pitcher of 2007, and also classifying pitches for Joaquin Benoit and C.J. Wilson.

Jeremy Bonderman

Chad Bradford

Bill Bray

  • On September 24, Justin inAZ published “Could Jared Burton Be Another Mariano Rivera?“, an article with pitch classification plots from fellow author John Walsh for pitchers Homer Bailey, David Weathers, Jared Burton, Bill Bray, Todd Coffey, and Gary Majewski.

Clay Buchholz

  • On July 26, Joe P. Sheehan published a collection of PITCHf/x-related notes under the title “Not an Article about Pitching at Altitude”. He discusses preliminary data about the effect of altitude on the break of pitches, and updates his BABIP charts from “Location, Location, Location”.

Mark Buehrle

A.J. Burnett

Jared Burton

  • On September 24, Justin inAZ published “Could Jared Burton Be Another Mariano Rivera?“, an article with pitch classification plots from fellow author John Walsh for pitchers Homer Bailey, David Weathers, Jared Burton, Bill Bray, Todd Coffey, and Gary Majewski.
  • On December 14, Joe P. Sheehan published “The Same Things“, an article about calculating similarity scores for pitches from different pitchers and a look at pitcher Jared Burton.

Paul Byrd

Chris Capuano

  • On September 12, Josh Kalk published “More Fun with PITCHf/x“, an article applying his pitch classification algorithm to Yovani Gallardo, Francisco Cordero, Chris Capuano, and Brian Shouse.

Fausto Carmona

  • On October 5, Dan Fox published “Carmona’s Trend“, an article looking at Fausto Carmona’s pitch mix.
  • On October 21, Jonathan Hale published “Carmona Got Squeezed“, an article about the called strike zone for Fausto Carmona’s October 20th ALCS start.

Joba Chamberlain

  • On August 14, I published “What Does Joba Throw?”, an article classifying Joba Chamberlain’s pitches in his August 10th appearance.
  • On November 15, I published “Appeasement“, an article classifying pitches for Joba Chamberlain.
  • On November 18, I published “Swinging at Shoe Tops?“, an article with strike zone charts by pitch type for Joba Chamberlain and examining a PITCHf/x data error.
  • On January 15, 2008, SG of RLYW published “Pitch F/X and Joba Chamberlain“, an article looking at the results of Joba Chamberlain’s pitches by pitch type.

Roger Clemens

  • On September 16, Whither published “Gameday Pearl Radar” (Google translation of the title, sorry!), a Chinese-language article about pitch classification for Andy Pettitte, Daisuke Matsuzaka, Chien-Ming Wang, Josh Beckett, Roger Clemens, and Curt Schilling. The graphs are in English, so you might get something out of the article even if you can’t read Chinese.

Todd Coffey

  • On September 24, Justin inAZ published “Could Jared Burton Be Another Mariano Rivera?“, an article with pitch classification plots from fellow author John Walsh for pitchers Homer Bailey, David Weathers, Jared Burton, Bill Bray, Todd Coffey, and Gary Majewski.

Jose Contreras

  • On September 13, Josh Kalk published “Progress. Errrr, Sort of.“, an article updating the results from his pitch classification algorithm.

Aaron Cook

  • On April 26, Joe P. Sheehan published “That Sinking Feeling”, an article about the two-seam fastball, examining pitchers Derek Lowe, Aaron Cook, Brandon Webb, and Carlos Silva.

Francisco Cordero

  • On September 12, Josh Kalk published “More Fun with PITCHf/x“, an article applying his pitch classification algorithm to Yovani Gallardo, Francisco Cordero, Chris Capuano, and Brian Shouse.

Manny Corpas

John Danks

  • On August 30, Steve West published “Danks but No Danks”, an article looking at pitcher John Danks and classifying his pitches.

Doug Davis

  • On October 4, Harry Pavlidis published “Cubs v Davis“, an article classifying pitch types for Doug Davis.

Zack Duke

Adam Eaton

Josh Fogg

Jeff Francis

Eric Gagne

  • On October 2, I published “Going, Going, Gagne!“, an article classifying pitch types for Eric Gagne.
  • On October 3, I published “Gagne Fishing“, an article with strike zone charts by pitch type for Eric Gagne.

Yovani Gallardo

  • On September 12, Josh Kalk published “More Fun with PITCHf/x“, an article applying his pitch classification algorithm to Yovani Gallardo, Francisco Cordero, Chris Capuano, and Brian Shouse.

Tom Glavine

  • On November 20, Josh Kalk published “Anatomy of a Player: Tom Glavine“, an article classifying Tom Glavine’s pitches and charting the strike zone location of his fastballs.

Tom Gorzelanny

Zack Greinke

  • On September 17, I published “Simple Is Good“, an article classifying Zack Greinke’s pitch types and comparing his performance as a reliever and as a starter.

Roy Halladay

  • On June 28, Joe P. Sheehan published “Is There Something in the Way It Moves?”, on pitcher Roy Halladay and the consistency of his stuff from start to start.
  • On August 10, Joe P. Sheehan published “Makin’ a Filter”, an article about an automated method for classifying all pitches into either fastball or off-speed and drawing some conclusions from the data about when each type of pitch is thrown.
  • On August 23, Dan Fox published “Visualizing Pitches”, an article looking at pitch trajectories in three dimensions.
  • On October 13, Jonathan Hale published “Pitching Forensics–The Doctor Is In“, an article examining characteristics of Roy Halladay’s rough patch in the first half of the season.

Cole Hamels

  • On June 14, Joe P. Sheehan published “Ch-ch-ch-ch-changes…”, on the effectiveness of the changeup and pitchers Cole Hamels, Josh Beckett, Trevor Hoffman, and Johan Santana.

Aaron Harang

Dan Haren

  • On July 13, Joe P. Sheehan published “Under Pressure”, on pitchers Jake Peavy and Dan Haren and their pitch selection in high-pressure versus low-pressure situations.
  • On July 30, Steve West published “Do Pitchers Affect the Strike Zone”, a look at batted ball results plotted against pitch location in the strike zone.

Felix Hernandez

Livan Hernandez

Rich Hill

  • On May 25, Joe P. Sheehan published “Dangerous Curves”, on the break of the curveball and pitchers Barry Zito and Rich Hill.
  • On August 17, Joe P. Sheehan published “May I Have Seconds”, an article about calculating pitched ball trajectories.
  • On August 22, Harry Pavlidis published “Rich Hill’s Four Pitches”, an article classifying, not surprisingly, Rich Hill’s pitches.
  • On August 23, Harry Pavlidis published “Rich Hill – Numbers”, an article looking at the results of those pitches.
  • On August 23, Dan Fox published “Visualizing Pitches”, an article looking at pitch trajectories in three dimensions.
  • On September 2, Harry Pavlidis published “Other Side of Hill”, an article showing Rich Hill’s pitch location versus pitch type.
  • On September 2, Harry Pavlidis published “Fooled by Hill”, an article about strike zone calls on Rich Hill’s various pitch types.
  • On September 2, Harry Pavlidis published Hill ≠ Marshall, an article comparing pitchers Rich Hill and Sean Marshall.
  • On September 16, Harry Pavlidis published “Clusters“, an article about using k-means cluster analysis to classify pitch types.
  • On October 6, Harry Pavlidis published “Hill’s Curve and the Weather“, an article examining the effect of weather conditions on the break of Rich Hill’s curveball.

Trevor Hoffman

  • On June 14, Joe P. Sheehan published “Ch-ch-ch-ch-changes…”, on the effectiveness of the changeup and pitchers Cole Hamels, Josh Beckett, Trevor Hoffman, and Johan Santana.

Tim Hudson

  • On July 2, THT published “A Close Look at Tim Hudson”, an article about pitcher Tim Hudson and classifying his pitches using a statistical clustering function.

Phil Hughes

  • On May 10, Dan Fox’s article “Phil Hughes, Pitch by Pitch” discussed Hughes’ May 1st start in detail, including release point and fastball velocity throughout the game.

Ubaldo Jimenez

  • On August 25, Dan Fox published “Jimenez Delivers”, an article about Ubaldo Jimenez’s August 25th start.
  • On October 7, Dan Fox published “Rocktober Rocks On!“, an article containing game notes from the Colorado-Philadelphia Division Series Game 3, including comments about pitches from Ubaldo Jimenez.
  • On October 25, Eric Van posted a pitch type breakdown of Ubaldo Jimenez to the Sons of San Horn message board. See post #25.
  • On October 26, Dan Fox published “Game Two Notes“, including a section on the consistency of Ubaldo Jimenez’s release point.

Jair Jurrjens

Scott Kazmir

Hong-Chih Kuo

John Lackey

  • On April 19, Joe P. Sheehan published “More Fun with Enhanced Gameday”, an article about consistency of pitch movement, location, and release points, and classifying pitches for John Lackey.

Jon Lester

  • On August 8, Dr. Alan Nathan published “Analysis of PITCHf/x Pitched Baseball Trajectories” (PDF), a paper looking at Jon Lester’s start on August 3rd and classifying his pitches according to speed, spin magnitude, and spin direction.
  • On October 28, SoxScout posted a pitch characterization for Jon Lester’s World Series Game 4 start to the Sons of San Horn message board. See post #35.
  • On October 30, Eric Van posted a pitch selection comparison for Jon Lester between his World Series Game 4 start and his ALCS relief appearance to the Sons of San Horn message board. See post #36.

Ted Lilly

  • On September 16, Harry Pavlidis published “Ted Lilly Clusters“, an article applying k-means cluster analysis to classify pitch types for Ted Lilly.

Tim Lincecum

  • On December 4, Josh Kalk published “Anatomy of a Player: Tim Lincecum“, an article classifying Tim Lincecum’s pitches and charting the strike zone location of his changeups.

Jesse Litsch

Esteban Loaiza

  • On September 4, Harry Pavlidis published “Dodgers v Cubs”, an article about pitch types thrown by the Dodgers’ rotation: Brad Penny, Derek Lowe, Esteban Loaiza, Eric Stults.

Kameron Loe

Derek Lowe

  • On April 26, Joe P. Sheehan published “That Sinking Feeling”, an article about the two-seam fastball, examining pitchers Derek Lowe, Aaron Cook, Brandon Webb, and Carlos Silva.
  • On August 23, Dan Fox published “Visualizing Pitches”, an article looking at pitch trajectories in three dimensions.
  • On September 4, Harry Pavlidis published “Dodgers v Cubs”, an article about pitch types thrown by the Dodgers’ rotation: Brad Penny, Derek Lowe, Esteban Loaiza, Eric Stults.
  • On September 7, Joe P. Sheehan published “That Sinking Feeling: Part Deux”, an article examining the relationship between sinkers and ground balls.

Greg Maddux

  • On September 12, I published “Mad Dog Mishmash“, an article classifying pitch types for Greg Maddux.
  • On October 19, Joe P. Sheehan published “Pitch Sequencing“, an article examining pitch sequences for Josh Beckett, C.C. Sabathia, and Greg Maddux.

Pat Maholm

Gary Majewski

  • On September 24, Justin inAZ published “Could Jared Burton Be Another Mariano Rivera?“, an article with pitch classification plots from fellow author John Walsh for pitchers Homer Bailey, David Weathers, Jared Burton, Bill Bray, Todd Coffey, and Gary Majewski.

Mike Maroth

Carlos Marmol

  • On September 2, Harry Pavlidis published “Marmol”, an article about pitcher Carlos Marmol.

Sean Marshall

  • On September 2, Harry Pavlidis published Hill ≠ Marshall, an article comparing pitchers Rich Hill and Sean Marshall.

Pedro Martinez

  • On September 22, mb22414 published “Checking in on Pedro“, an article about pitcher Pedro Martinez’s performance since returning from surgery.
  • On November 1, John Walsh published “Don’t Blame Pedro“, an article classifying pitches and examining pitching strategies for Pedro Martinez.

Daisuke Matsuzaka

  • On July 5, Dan Fox published “Searching for the Gyroball”, an article about pitcher Daisuke Matsuzaka and classifying his pitches.
  • On August 23, Dan Fox published “Visualizing Pitches”, an article looking at pitch trajectories in three dimensions.
  • On September 16, Whither published “Gameday Pearl Radar” (Google translation of the title, sorry!), a Chinese-language article about pitch classification for Andy Pettitte, Daisuke Matsuzaka, Chien-Ming Wang, Josh Beckett, Roger Clemens, and Curt Schilling. The graphs are in English, so you might get something out of the article even if you can’t read Chinese.
  • On October 27, Dan Fox published “Sliders but no Gyro“, an article looking at Daisuke Matsuzaka’s pitch mix.
  • On October 27, SoxScout posted a pitch characterization for Daisuke Matsuzaka’s World Series Game 3 start to the Sons of San Horn message board. See post #34.

Brandon McCarthy

  • On June 18, Steve West published “Rangers Rotation Pitch Types”, an article classifying the pitch types of Texas pitchers Kevin Millwood, Brandon McCarthy, Kameron Loe, Vicente Padilla, and Robinson Tejeda.
  • On June 25, Steve West published “Rangers Rotation Release Points Redux”, an article examining whether the Texas starters were tipping their pitches by varying release points.
  • On July 12, Steve West published “Pitch Break Angle vs Length”, and article about classifying pitch types using these two new PITCHf/x parameters.
  • On August 3, Steve West published “More McCarthy”, an article about pitcher Brandon McCarthy, classifying his pitches.

Dustin McGowan

Andrew Miller

Kevin Millwood

Franklin Morales

  • On July 26, Joe P. Sheehan published a collection of PITCHf/x-related notes under the title “Not an Article about Pitching at Altitude”. He discusses preliminary data about the effect of altitude on the break of pitches, and updates his BABIP charts from “Location, Location, Location”.

Matt Morris

Mike Mussina

  • On March 29, Joe P. Sheehan published “Enhanced Gameday”, an article about various pitchers from the 2006 playoffs, looking at pitch location, release points, and classifying pitches for Mike Mussina.

Joe Nathan

Hideki Okajima

  • On October 25, SoxScout posted pitch characterizations for Curt Schilling’s World Series Game 2 start and Hideki Okajima’s relief appearance to the Sons of San Horn message board. See post #28.

Micah Owings

  • On August 24, Harry Pavlidis published “Micah Owings”, an article classifying the pitches of Micah Owings.

Vicente Padilla

Jonathan Papelbon

  • On September 7, I published “Magnus Papelbonus”, an article about pitcher Jonathan Papelbon and techniques for classifying pitches by spin direction.
  • On September 10, I published “Papelbon Redux“, an update to my previous article about Jonathan Papelbon with pitch classification and park variance data.
  • On September 19, Josh Kalk published “Corrections to the Corrections?“, an article about looking for changes over time in his park corrections to the PITCHf/x data.

Troy Patton

  • On August 31, Harry Pavlidis also published “Patton Preview”, an article looking at Astros’ pitcher Troy Patton.
  • On September 1, Harry Pavlidis published “Patton vs. Wandy”, an article about pitchers Troy Patton and Wandy Rodriguez.

Jake Peavy

Brad Penny

  • On September 4, Harry Pavlidis published “Dodgers v Cubs”, an article about pitch types thrown by the Dodgers’ rotation: Brad Penny, Derek Lowe, Esteban Loaiza, Eric Stults.

Andy Pettitte

  • On September 16, Whither published “Gameday Pearl Radar” (Google translation of the title, sorry!), a Chinese-language article about pitch classification for Andy Pettitte, Daisuke Matsuzaka, Chien-Ming Wang, Josh Beckett, Roger Clemens, and Curt Schilling. The graphs are in English, so you might get something out of the article even if you can’t read Chinese.

Mariano Rivera

Wandy Rodriguez

  • On September 1, Harry Pavlidis published “Patton vs. Wandy”, an article about pitchers Troy Patton and Wandy Rodriguez.

Kenny Rogers

Kirk Saarloos

  • On September 14, Josh Kalk published “Reds @ Brewers Pitching Preview“, an article applying his pitch classification algorithm to Tom Shearn, Kirk Saarloos, Matt Belisle, Ben Sheets, Jeff Suppan, and Carlos Villanueva.

C.C. Sabathia

  • On October 12, Joe P. Sheehan published “Beckett vs. Sabathia“, an article classifying pitches and examining pitching strategies for Josh Beckett and C.C. Sabathia.
  • On October 19, Joe P. Sheehan published “Pitch Sequencing“, an article examining pitch sequences for Josh Beckett, C.C. Sabathia, and Greg Maddux.

Johan Santana

Curt Schilling

  • On June 26, John Walsh published “Schilling’s Aching Schoulder”, an article about detecting Curt Schilling’s shoulder injury in the Enhanced Gameday data.
  • On September 16, Whither published “Gameday Pearl Radar” (Google translation of the title, sorry!), a Chinese-language article about pitch classification for Andy Pettitte, Daisuke Matsuzaka, Chien-Ming Wang, Josh Beckett, Roger Clemens, and Curt Schilling. The graphs are in English, so you might get something out of the article even if you can’t read Chinese.
  • On October 21, Jonathan Hale published “Pitching on Fumes“, an article about Curt Schilling’s Game 6 start in the ALCS.
  • On October 25, SoxScout posted pitch characterizations for Curt Schilling’s World Series Game 2 start and Hideki Okajima’s relief appearance to the Sons of San Horn message board. See post #28.

Ben Sheets

  • On August 29, Harry Pavlidis published “Zambrano vs. Sheets, in LA”, an article comparing pitchers Carlos Zambrano and Ben Sheets from starts earlier in the season in Dodger Stadium.
  • On August 30, Josh Kalk published “Sheets Returns from the DL”, an article looking at Ben Sheets’ start on August 29th.
  • On August 31, Harry Pavlidis published “Zambrano vs. Sheets, Wrigley Edition”, an article comparing Carlos Zambrano and Ben Sheets in their starts in the August 29th game.
  • On September 14, Josh Kalk published “Reds @ Brewers Pitching Preview“, an article applying his pitch classification algorithm to Tom Shearn, Kirk Saarloos, Matt Belisle, Ben Sheets, Jeff Suppan, and Carlos Villanueva.

Tom Shearn

  • On September 14, Josh Kalk published “Reds @ Brewers Pitching Preview“, an article applying his pitch classification algorithm to Tom Shearn, Kirk Saarloos, Matt Belisle, Ben Sheets, Jeff Suppan, and Carlos Villanueva.
  • On September 19, Harry Pavlidis published “Tonight’s Opponent: Tom Shearn“, an article classifying pitch types for Tom Shearn.
  • On September 19, Harry Pavlidis published “Shearn Speed“, an article looking at start-to-start variance in pitch speed for Tom Shearn and whether it is a park and wind-related effect.

James Shields

Brian Shouse

  • On September 12, Josh Kalk published “More Fun with PITCHf/x“, an article applying his pitch classification algorithm to Yovani Gallardo, Francisco Cordero, Chris Capuano, and Brian Shouse.

Carlos Silva

  • On April 26, Joe P. Sheehan published “That Sinking Feeling”, an article about the two-seam fastball, examining pitchers Derek Lowe, Aaron Cook, Brandon Webb, and Carlos Silva.
  • On December 18, Dave Cameron published “Carlos Silva“, an article examining Silva’s pitching style based on Josh Kalk’s PITCHf/x data.

John Smoltz

Ian Snell

Joakim Soria

Ryan Speier

  • On October 25, Jonathan Hale published “Worst. Outing. Ever.“, an article about Ryan Speier’s World Series Game 1 performance.

Eric Stults

  • On September 3, Harry Pavlidis published “Stults – Trial Balloon”, an article showing 3-D pitch trajectory plots for pitcher Eric Stults.
  • On September 4, Harry Pavlidis published “Dodgers v Cubs”, an article about pitch types thrown by the Dodgers’ rotation: Brad Penny, Derek Lowe, Esteban Loaiza, Eric Stults.

Jeff Suppan

  • On September 14, Josh Kalk published “Reds @ Brewers Pitching Preview“, an article applying his pitch classification algorithm to Tom Shearn, Kirk Saarloos, Matt Belisle, Ben Sheets, Jeff Suppan, and Carlos Villanueva.

Robinson Tejeda

Justin Verlander

  • On July 26, Joe P. Sheehan published a collection of PITCHf/x-related notes under the title “Not an Article about Pitching at Altitude”. He discusses preliminary data about the effect of altitude on the break of pitches, and updates his BABIP charts from “Location, Location, Location”.

Carlos Villanueva

  • On September 14, Josh Kalk published “Reds @ Brewers Pitching Preview“, an article applying his pitch classification algorithm to Tom Shearn, Kirk Saarloos, Matt Belisle, Ben Sheets, Jeff Suppan, and Carlos Villanueva.

Edinson Volquez

Tim Wakefield

Billy Wagner

Chien-Ming Wang

David Weathers

  • On September 24, Justin inAZ published “Could Jared Burton Be Another Mariano Rivera?“, an article with pitch classification plots from fellow author John Walsh for pitchers Homer Bailey, David Weathers, Jared Burton, Bill Bray, Todd Coffey, and Gary Majewski.

Jeff Weaver

  • On February 28, Joe P. Sheehan published “Fingerprinting Jeff Weaver”, an article about pitcher Jeff Weaver, classifying his pitches based on his performance in the 2006 playoffs with St. Louis.
  • On June 21, Dave Cameron published “Weaver: Better Stuff?”, an article about the velocity and movement on Jeff Weaver’s pitches.
  • On August 13, Dave Cameron published “Jeff Weaver, Junkballer”, an article about Jeff Weaver’s start on August 12th.

Brandon Webb

Jake Westbrook

C.J. Wilson

  • On August 16, Steve West published “Passing Out POTY Ballots”, an article about choosing the Rangers’ best pitcher of 2007, and also classifying pitches for Joaquin Benoit and C.J. Wilson.

Randy Wolf

  • On June 6, John Walsh published “In Search of the Sinker”, one of the definitive articles on classifying pitches. In this process John examines the sinking fastball and pitcher Randy Wolf.

Jamey Wright

Chris Young

Carlos Zambrano

Barry Zito

  • On May 25, Joe P. Sheehan published “Dangerous Curves”, on the break of the curveball and pitchers Barry Zito and Rich Hill.
  • On August 23, Dan Fox published “Visualizing Pitches”, an article looking at pitch trajectories in three dimensions.
  • On September 21, Joe P. Sheehan published “‘Breaking’ Away“, an article about methods of describing and quantifying pitch movement, or break, looking at Barry Zito’s pitch types with these methods, and listing pitchers with the largest break for each of the major pitch types.

Joel Zumaya

  • On October 26, 2006, Dan Fox published “Information Revolution”, an introductory article about the PITCHf/x system.
  • On March 29, Joe P. Sheehan published “Enhanced Gameday”, an article about various pitchers from the 2006 playoffs, looking at pitch location, release points, and classifying pitches for Mike Mussina.
  • On April 13, Bill Ferris published “A Different Look at Zumaya’s Outing”, an article about velocity and release point in Joel Zumaya’s two-inning save on April 12th.

Other Pitchers

  • On September 11, Josh Kalk published “Player Cards“, an article about the initial results from his pitch classification algorithm. Along with the article is a link to a set of graphs for almost 300 pitchers.
  • On September 19, John Walsh published “Pitch Identification Tutorial“, as its title indicates, a tutorial about pitch types, including pitch charts for about 150 pitchers.
  • On September 20, Josh Kalk published “Brand New Player Cards“, an article with links to his new pitcher charts with normalized x-z initial points and accelerations, this time including home and road data.
  • On November 14, Josh Kalk published “Web-based PITCHf/x Tool“, an article introducing a web-based tool to query his PITCHf/x database.
  • On December 3, Josh Kalk published “Web-based PITCHf/x Tool Help/Comment Page“, an article explaining the updates to the PITCHf/x query tool.
  • On December 13, Josh Kalk published “Anatomy of a Player: League Average Pitcher“, an article detailing the average pitch speeds and spin-induced break for major league fastballs, sinkers, and cutters.
  • On December 20, John Walsh published “Fastball, Slider, Changeup, Curveball–An Analysis“, an article detailing the league average speed and spin movement, usage by handedness and count, and results for pitches and balls in play for each of the four basic pitch types. This piece is an outstanding reference.

Last updated January 15, 2008.

The updated version of this catalog is now hosted by The Hardball Times.

In the spirit of better organization, here is the Enhanced Gameday analysis catalog organized by author.

You can also see the full list of articles by date, and articles about pitchers listed by pitcher.

Anthony at FriarWatch (3 articles)

BadAssBaseball blog (3 articles)

Chris at Bay City Ball (2 articles)

John Beamer (2 articles)

Jake at Bucco Blog (4 articles)

  • On October 26, Jake at Bucco Blog published “Manager Poll, Rumors, and PITCHf/x“, an article listing the batting performance for Pirates’ hitters against various pitch types.
  • On October 28, Jake at Bucco Blog published “Even More Rumors, Poll, and PITCHf/x“, an article examining the percentage of pitch types that Pirates’ hitters saw in various ball-strike counts.
  • On December 30, Jake at Bucco Blog published “PITCHf/x, Beaver’s Culture, and Only 2 Days Left“, an article showing the pitch results for fastballs thrown by Pat Maholm, Ian Snell, Tom Gorzelanny, Matt Morris, and Zack Duke.
  • On December 30, Jake at Bucco Blog published “Dejan’s McLouth Pipe-Dream“, an article looking at Nate McLouth’s hitting performance against the slider.

Steve Calcagno (1 article)

Dave Cameron (3 articles)

  • On June 21, he published “Weaver: Better Stuff?”, an article about the velocity and movement on Jeff Weaver’s pitches.
  • On August 13, he published “Jeff Weaver, Junkballer”, an article about Jeff Weaver’s start on August 12th.
  • On December 18, he published “Carlos Silva“, an article examining Silva’s pitching style based on Josh Kalk’s PITCHf/x data.

Louis Chao (2 articles)

  • On June 26, he published, in Chinese, “Diggin’ in on the Sinker”, an article looking at sinkerball pitchers. Putting this article through Google Translate to English makes it clear why that tool is still in beta. ;)
  • On July 12, THT published “Another Look at the Sinker”, an article comparing the two-seam and four-seam fastballs and looking at pitcher A.J. Burnett.

Rob at Colamarino Has Titties (2 articles)

  • On January 17, 2008, he published “Jay-f/x 2007: Introduction“, an article looking at the PITCHf/x data and pitch selection for the Blue Jays pitching staff in 2007.
  • On January 23, 2008, he published “Jay-f/x 2007: Fastballs“, an article examining the PITCHf/x data for fastballs thrown by the Blue Jays pitching staff in 2007.

Chris Constancio (1 article)

Mike Fast (28 articles)

Bill Ferris (10 articles)

Dan Fox (22 articles)

Tom Goyne (2 articles)

Doug Gray (3 articles)

Jonathan Hale (32 articles)

Ike Hall (6 articles)

  • On September 12, he published “A Side Project Perhaps“, an article with some thoughts on the PITCHf/x data set and questions that could be asked of it.
  • On September 13, he published “Thinking about Calibration“, an article about PITCHf/x calibration procedures.
  • On September 17, he published “More PITCHfx Thoughts“, an article with further thoughts about PITCHf/x calibration procedures and trajectory calculation.
  • On September 24, he published “More Calibration Thoughts“, an article with additional thoughts about PITCHf/x calibration procedures.
  • On October 3, he published “Finding the Zone“, an article about strike zone measurement accuracy by park.
  • On February 27, 2008, he published “Acceleration due to drag and PitchF/X“, an article about park corrections to the acceleration data and examining the drag constant vs. velocity curves for various parks.

Josh Kalk (28 articles)

Justin Inaz (2 articles)

  • On September 19, he published “PITCHf/x Plots for Harang and Arroyo“, an article discussing pitch classification plots for pitchers Aaron Harang and Bronson Arroyo.
  • On September 24, he published “Could Jared Burton Be Another Mariano Rivera?“, an article with pitch classification plots from fellow author John Walsh for pitchers Homer Bailey, David Weathers, Jared Burton, Bill Bray, Todd Coffey, and Gary Majewski.

mb22414 from FriarForecast (6 articles)

Dr. Alan Nathan (4 articles)

  • On August 8, he published “Analysis of PITCHf/x Pitched Baseball Trajectories” (PDF), a paper looking at Jon Lester’s start on August 3rd and classifying his pitches according to speed, spin magnitude, and spin direction. This technique shows important promise for pitch classification independent of release point measurement distance (y0). Plus there’s a lot of cool stuff on equations of motions for any other physicists out there.
  • On October 4, Eric Van and Alan Nathan posted a breakdown of Josh Beckett’s October 3rd playoff start to the Sons of Sam Horn message board. See posts #64, #92, and #93.
  • On December 19, he published “Effect of the Magnus Force in the PITCHf/x Tracking System“, an article deriving improved equations for the break and spin of a pitch due to the Magnus force, accounting for the effect of drag in the x and z directions.
  • On February 8, 2008, he published “A Statistical Study of PITCHf/x Pitched Baseball Trajectories“, an article about error calculation and propagation for quantities calculated from PITCHf/x data.

Mark Newman (1 article)

Harry Pavlidis (36 articles)

  • On August 22, he published “Rich Hill’s Four Pitches”, an article classifying, not surprisingly, Rich Hill’s pitches.
  • On August 23, he published “Rich Hill – Numbers”, an article looking at the results of those pitches.
  • On August 24, he published “Micah Owings”, an article classifying the pitches of Micah Owings.
  • On August 26, he published “Just an Example” and “More out of the Zone”, a pair of articles about players who swing at pitches above or below the strike zone.
  • On August 29, he published “Zambrano vs. Sheets, in LA”, an article comparing pitchers Carlos Zambrano and Ben Sheets from starts earlier in the season in Dodger Stadium.
  • On August 31, he published “Zambrano vs. Sheets, Wrigley Edition”, an article comparing Carlos Zambrano and Ben Sheets in their starts in the August 29th game.
  • On August 31, he also published “Patton Preview”, an article looking at Astros’ pitcher Troy Patton.
  • On September 1, he published “Patton vs. Wandy”, an article about pitchers Troy Patton and Wandy Rodriguez.
  • On September 2, he published “Other Side of Hill”, an article showing Rich Hill’s pitch location versus pitch type.
  • On September 2, he published “Fooled by Hill”, an article about strike zone calls on Rich Hill’s various pitch types.
  • On September 2, he published Hill ≠ Marshall, an article comparing pitchers Rich Hill and Sean Marshall.
  • On September 2, he published “Marmol”, an article about pitcher Carlos Marmol.
  • On September 3, he published “Stults – Trial Balloon”, an article showing 3-D pitch trajectory plots for pitcher Eric Stults.
  • On September 4, he published “Dodgers v Cubs”, an article about pitch types thrown by the Dodgers’ rotation: Brad Penny, Derek Lowe, Esteban Loaiza, Eric Stults.
  • On September 9, he published “Finding the Zone”, an article about inconsistencies in the PITCHf/x data for the strike zone parameters sz_top and sz_bot.
  • On September 10, he published “A Matter of Style and Judgment“, an article about hitters’ strike zone judgment.
  • On September 11, he published “Aiming High“, an article about hitters’ contact rates and home runs on high pitches.
  • On September 15, he published “Swing Low (Sweet Chariot) Geoff Jenkins“, an article about hitters’ contact rates and home runs on low pitches.
  • On September 16, he published “Clusters“, an article about using k-means cluster analysis to classify pitch types.
  • On September 16, he published “Ted Lilly Clusters“, an article applying k-means cluster analysis to classify pitch types for Ted Lilly.
  • On September 17, he published “Updated Script, Plus Some Extra SQL“, an article sharing code for his spider and parser and database structure for his hitter strike zone and pitch spin plots.
  • On September 17, he published “Arroyo Clusters“, an article classifying pitch types for Bronson Arroyo.
  • On September 19, he published “Tonight’s Opponent: Tom Shearn“, an article classifying pitch types for Tom Shearn.
  • On September 19, he published “Shearn Speed“, an article looking at start-to-start variance in pitch speed for Tom Shearn and whether it is a park and wind-related effect.
  • On September 22, he published “Hello Soto“, an article with a strike zone chart for Geovany Soto.
  • On September 22, he published “Local Kid, Probably a Sox Fan“, an article looking at pitch types for Tom Gorzelanny.
  • On September 25, he published “Up Next: Dan Barone“, an article about pitch Dan Barone, examining his pitch types using spin rate graphs.
  • On September 26, he published “Peskiest of the Fish“, an article about a Jeremy Hermida at bat on September 25th.
  • On September 26, he published “Peskiest of the Fish Part 2“, an article about two Jeremy Hermida at bats on September 25th.
  • On October 4, he published “Cubs v Davis“, an article classifying pitch types for Doug Davis.
  • On October 6, he published “Livan’s Bag-o-Tricks“, an article classifying pitch types for Livan Hernandez.
  • On October 6, he published “Hill’s Curve and the Weather“, an article examining the effect of weather conditions on the break of Rich Hill’s curveball.
  • On December 6, he published “Jose Ascanio“, an article characterizing pitches for Jose Ascanio.
  • On December 17, he published “Winter Pie“, an article looking at what pitches Felix Pie saw and what he swung at.
  • On January 6, 2008, he published “Felix and Matt–Pitch Preferences“, an article showing pitches seen, swing rates, and contact rates by area of the strike zone for Felix Pie and Matt Murton.
  • On January 13, 2008, he published “Byrd Pitch Preferences“, an article showing pitches seen, swing rates, and contact rates by area of the strike zone for Marlon Byrd, Felix Pie, and Matt Murton.

Prof Pepper (6 articles)

  • On July 7, he published “Pitch by Pitch: Un Assaggio“, an Italian-language article about pitch location and the strike zone.
  • On July 14, he published “Cosi Si Vincono I Cy Young, Baby!“, an Italian-language article about pitchers Johan Santana and Joe Nathan.
  • On January 2, 2008, he published “Cosi’ Uguali, Cosi’ Diversi (Part 1)“, an Italian-language article looking for the most unique curveballs in major league baseball.
  • On January 5, 2008, he published “Cosi’ Uguali, Cosi’ Diversi (Part 2)“, an Italian-language article looking for the most unique fastballs in major league baseball.
  • On January 20, 2008, he published “Cosi’ Uguali, Cosi’ Diversi (Part 3)“, an Italian-language article looking for the most unique sliders, changeups, and curveballs in major league baseball along with illustrations of the grips for each pitch.
  • On February 3, 2008, he published “Cosi’ Uguali, Cosi’ Diversi (Part 4)“, an Italian-language article summarizing his series on the most unique pitches in major league baseball, discussing a few other less common pitches, and looking at the breakdown of outcomes for each pitch type, split out by handedness.

SG at Replacement Level Yankees Weblog (1 article)

  • On January 15, 2008, SG published “Pitch F/X and Joba Chamberlain“, an article looking at the results of Joba Chamberlain’s pitches by pitch type.

Greg Rybarczyk (1 article)

  • On February 28, 2008, THT published “Seeing is believing“, an article about a concept he calls observational analysis, expanding beyond PITCHf/x to capturing speed-off-bat data and fielding information.

Renè Saggiadi (0 articles)

  • Rene’s extensive list of articles in the Italian language can be found at his blog: .144.

Joe P. Sheehan (37 articles)

  • On February 28, he published “Fingerprinting Jeff Weaver”, an article about pitcher Jeff Weaver, classifying his pitches based on his performance in the 2006 playoffs with St. Louis.
  • On March 29, he published “Enhanced Gameday”, an article about various pitchers from the 2006 playoffs, looking at pitch location, release points, and classifying pitches for Mike Mussina.
  • On April 18, THT published “Another Look at Enhanced Gameday”, an article about pitch selection, velocity, and classifying pitches for Felix Hernandez and Kevin Millwood.
  • On April 19, he published “More Fun with Enhanced Gameday”, an article about consistency of pitch movement, location, and release points, and classifying pitches for John Lackey.
  • On April 26, he published “That Sinking Feeling”, an article about the two-seam fastball, examining pitchers Derek Lowe, Aaron Cook, Brandon Webb, and Carlos Silva.
  • On May 11, he published “Location, Location, Location”, tracking the location, BABIP, and swing percentage of pitches in different grid locations around the strike zone.
  • On May 25, he published “Dangerous Curves”, on the break of the curveball and pitchers Barry Zito and Rich Hill.
  • On June 14, he published “Ch-ch-ch-ch-changes…”, on the effectiveness of the changeup and pitchers Cole Hamels, Josh Beckett, Trevor Hoffman, and Johan Santana.
  • On June 28, he published “Is There Something in the Way It Moves?”, on pitcher Roy Halladay and the consistency of his stuff from start to start.
  • On July 13, he published “Under Pressure”, on pitchers Jake Peavy and Dan Haren and their pitch selection in high-pressure versus low-pressure situations.
  • On July 26, he published a collection of PITCHf/x-related notes under the title “Not an Article about Pitching at Altitude”. He discusses preliminary data about the effect of altitude on the break of pitches, and updates his BABIP charts from “Location, Location, Location”.
  • On August 10, he published “Makin’ a Filter”, an article about an automated method for classifying all pitches into either fastball or off-speed and drawing some conclusions from the data about when each type of pitch is thrown.
  • On August 17, he published “May I Have Seconds”, an article about calculating pitched ball trajectories.
  • On August 24, he published “Park Differences and Reaction Distances”, an article examining PITCHf/x data inconsistencies between parks and looking at batter reactions times and distances for different pitches.
  • On August 31, he published “And Now for Something Completely Different”, an article showing hit charts for various situations and cross-referencing some information from his pitch database.
  • On September 7, he published “That Sinking Feeling: Part Deux”, an article examining the relationship between sinkers and ground balls.
  • On September 13, he published “The Other Side of the Pitch“, an article looking at BABIP strike zone charts for Vladimir Guerrero and Jason Kendall and also examining which hitters see which types of pitches most often.
  • On September 21, he published “‘Breaking’ Away“, an article about methods of describing and quantifying pitch movement, or break, looking at Barry Zito’s pitch types with these methods, and listing pitchers with the largest break for each of the major pitch types.
  • On September 28, he published “Scouting Jake Peavy“, an article profiling pitcher Jake Peavy.
  • On October 12, he published “Beckett vs. Sabathia“, an article classifying pitches and examining pitching strategies for Josh Beckett and C.C. Sabathia.
  • On October 19, he published “Pitch Sequencing“, an article examining pitch sequences for Josh Beckett, C.C. Sabathia, and Greg Maddux.
  • On October 26, he published “Pitch Frequency“, an article looking at fastball pitch frequency for pitchers in different ball-strike counts.
  • On November 2, he published “Pitching to the Hitter“, an article examining fastball pitch frequency seen by hitters based on their slugging ability.
  • On November 16, he published “Predicting Pitches“, an article examining the percentage of fastballs thrown in different situations.
  • On November 23, he published “Post-Thanksgiving Quickie“, an article about the probability of a sinking and non-sinking fastballs to be hit on the ground or in the air.
  • On November 30, he published “Dirty Jobs“, an article examining fastball percentage and pitch location in various ball-strike counts.
  • On December 10, he published “Dirty Jobs: Part 2“, an article looking at ball-strike percentages for fastballs thrown at different counts.
  • On December 14, he published “The Same Things“, an article about calculating similarity scores for pitches from different pitchers and a look at pitcher Jared Burton.
  • On December 23, he published “Winter Wonderland“, an article showing how often each type of pitch is hit on the ground compared to what height it is thrown in the strike zone.
  • On January 4, 2008, he published “Old Man River“, an article looking at the performance characteristics of old pitchers versus young pitchers.
  • On January 10, 2008, he published “Grouping Maddness“, an article comparing the fastball and slider performance of hard-throwing and soft-tossing old and young pitchers.
  • On January 25, 2008, he published “First Things First“, an article looking at first-pitch tendencies based on pitch type.
  • On February 1, 2008, he published “Splitsville“, an article looking at the platoon splits by pitch type for pitchers Takashi Saito and Mariano Rivera.
  • On February 7, 2008, he published “Splitsville: Take 2“, an article looking at pitchers who threw a particular type of pitch much more often to batters of one handedness than the other.
  • On February 15, 2008, he published “Weighing In“, an article about calculating per-pitch run values and ranking some of the best pitches in baseball by this method.
  • On February 21, 2008, he published “More Run Values“, an article about per-pitch run values by ball-strike count and listing average values by pitch type and handedness of batter and pitcher.
  • On February 29, 2008, he published “Locational Run Values“, an article about per-pitch run values by strike zone location.

SoxScout (4 articles)

  • On October 24, SoxScout posted a pitch characterization for Josh Beckett’s World Series Game 1 start to the Sons of San Horn message board. See post #18.
  • On October 25, SoxScout posted pitch characterizations for Curt Schilling’s World Series Game 2 start and Hideki Okajima’s relief appearance to the Sons of San Horn message board. See post #28.
  • On October 27, SoxScout posted a pitch characterization for Daisuke Matsuzaka’s World Series Game 3 start to the Sons of San Horn message board. See post #34.
  • On October 28, SoxScout posted a pitch characterization for Jon Lester’s World Series Game 4 start to the Sons of San Horn message board. See post #35.

ultxmxpx (2 articles)

  • On June 3, he posted “Shields/Kazmir pitch selection” as a topic on the RaysBaseball forum.
  • On July 10, he published this list of pitchers and contact rate on their various pitches, which he had classified.

Eric Van (6 articles)

John Walsh (10 articles)

  • On June 6, THT published “In Search of the Sinker”, one of the definitive articles on classifying pitches. In this process John examines the sinking fastball and pitcher Randy Wolf.
  • On June 26, THT published “Schilling’s Aching Schoulder”, an article about detecting Curt Schilling’s shoulder injury in the Enhanced Gameday data.
  • On July 11, THT published “Strike Zone: Fact vs. Fiction”, an article about the strike zone, as called by the umpires, versus right-handed and left-handed batters.
  • On July 25, THT published John’s followup article “The Eye of the Umpire”, containing some refinements to the previous article. The pair of articles are an excellent beginning to strike zone analysis.
  • On September 4, THT published “Squaring It Up”, an article examining the results of pitches in and out of the strike zone.
  • On September 19, THT published “Pitch Identification Tutorial“, as its title indicates, a tutorial about pitch types, including pitch charts for about 150 pitchers.
  • On November 1, THT published “Don’t Blame Pedro“, an article classifying pitches and examining pitching strategies for Pedro Martinez.
  • On November 27, THT published “Butterflies Are Not Bullets“, an article examining pitcher Tim Wakefield.
  • On December 20, THT published “Fastball, Slider, Changeup, Curveball–An Analysis“, an article detailing the league average speed and spin movement, usage by handedness and count, and results for pitches and balls in play for each of the four basic pitch types. This piece is an outstanding reference.
  • On February 26, 2008, THT published “Searching for the game’s best pitch“, an article describing a method for calculating per-pitch run values and presenting ratings of some of the best of each pitch type from 2007 on this basis.

Steve West (13 articles)

Whither (5 articles)

Update in progress…

Last updated March 1, 2008, with the exception of work by Harry Pavlidis (last updated January 15) and Renè Saggiadi. If those two guys weren’t so prolific, I would have gotten them into this update, too.

The updated version of this catalog is now hosted by The Hardball Times.

Since my catalog of enhanced gameday articles has now expanded past seventy, it’s time for better organization. This post has all the articles listed by date.

I also plan to have all the articles listed by author, by topic, by team, and by pitcher.

October 2006 (1 article)

February 2007 (1 article)

  • On February 28, Joe P. Sheehan published “Fingerprinting Jeff Weaver”, an article about pitcher Jeff Weaver, classifying his pitches based on his performance in the 2006 playoffs with St. Louis.

March 2007 (1 article)

  • On March 29, Joe P. Sheehan published “Enhanced Gameday”, an article about various pitchers from the 2006 playoffs, looking at pitch location, release points, and classifying pitches for Mike Mussina.

April 2007 (7 articles)

May 2007 (6 articles)

  • On May 7, John Beamer published “Under the Skin of Enhanced Gameday”, an important article about the park-to-park accuracy of the PITCHf/x data, particularly release points.
  • On May 10, Dan Fox’s article “Phil Hughes, Pitch by Pitch” discussed Hughes’ May 1st start in detail, including release point and fastball velocity throughout the game.
  • On May 11, Joe P. Sheehan published “Location, Location, Location”, tracking the location, BABIP, and swing percentage of pitches in different grid locations around the strike zone.
  • On May 24, Dan Fox featured “Batter Versus Pitcher, Gameday Style”, an article about pitch velocity and strike zone accuracy.
  • On May 25, Joe P. Sheehan published “Dangerous Curves”, on the break of the curveball and pitchers Barry Zito and Rich Hill.
  • On May 31, Dan Fox published “Physics on Display”, an article about fastball deceleration from release to the plate and pitchers’ fastball velocity throughout the game.

June 2007 (19 articles)

July 2007 (14 articles)

August 2007 (35 articles)

September 2007 (69 articles)

  • On September 1, Harry Pavlidis published “Patton vs. Wandy”, an article about pitchers Troy Patton and Wandy Rodriguez.
  • On September 2, Harry Pavlidis published “Other Side of Hill”, an article showing Rich Hill’s pitch location versus pitch type.
  • On September 2, Harry Pavlidis published “Fooled by Hill”, an article about strike zone calls on Rich Hill’s various pitch types.
  • On September 2, Harry Pavlidis published Hill ≠ Marshall, an article comparing pitchers Rich Hill and Sean Marshall.
  • On September 2, Harry Pavlidis published “Marmol”, an article about pitcher Carlos Marmol.
  • On September 2, Josh Kalk published “Estrada Hit Chart”, an article showing hits by pitch location and ball/strike chart for Johnny Estrada.
  • On September 3, Josh Kalk published “Preliminary Correction to PitchFX Data”, an article looking at park-to-park inconsistencies in the PITCHf/x data for the vertical initial position parameter, z0.
  • On September 3, Harry Pavlidis published “Stults – Trial Balloon”, an article showing 3-D pitch trajectory plots for pitcher Eric Stults.
  • On September 4, John Walsh published “Squaring It Up”, an article examining the results of pitches in and out of the strike zone.
  • On September 4, Harry Pavlidis published “Dodgers v Cubs”, an article about pitch types thrown by the Dodgers’ rotation: Brad Penny, Derek Lowe, Esteban Loaiza, Eric Stults.
  • On September 5, Josh Kalk published “Preliminary Correction to PitchFX Data Part II”, an article further examining the variance by park in the vertical initial position parameter, z0.
  • On September 5, Josh Kalk published “Somewhat Pretty Pictures”, an article about correcting for park differences in horizontal and vertical initial position.
  • On September 6, Dan Fox published “Wily Mo Redux”, an article about Wily Mo Pena, including how he has hit various pitches in different counts and locations.
  • On September 6, Josh Kalk published “Response to a Reader Question”, an article about correcting the PITCHf/x data by park for the initial position, velocity, and acceleration parameters.
  • On September 7, mb22414 published “Another Look at Jake Peavy”, an article looking at Jake Peavy’s September 5th start and classifying his pitches.
  • On September 7, Joe P. Sheehan published “That Sinking Feeling: Part Deux”, an article examining the relationship between sinkers and ground balls.
  • On September 7, I published “Magnus Papelbonus”, an article about pitcher Jonathan Papelbon and techniques for classifying pitches by spin direction.
  • On September 8, Steve West published “Switching on a Lightbulb”, an article about pitcher Edinson Volquez.
  • On September 9, Harry Pavlidis published “Finding the Zone”, an article about inconsistencies in the PITCHf/x data for the strike zone parameters sz_top and sz_bot.
  • On September 10, I published “Papelbon Redux“, an update to my previous article about Jonathan Papelbon with pitch classification and park variance data.
  • On September 10, Harry Pavlidis published “A Matter of Style and Judgment“, an article about hitters’ strike zone judgment.
  • On September 11, Harry Pavlidis published “Aiming High“, an article about hitters’ contact rates and home runs on high pitches.
  • On September 11, Josh Kalk published “Player Cards“, an article about the initial results from his pitch classification algorithm. Along with the article is a link to a set of graphs for almost 300 pitchers.
  • On September 11, I published “How Many Seams Are You Holding?“, an article about differentiating the four-seam fastball and two-seam fastball from Edinson Volquez.
  • On September 12, Josh Kalk published “More Fun with PITCHf/x“, an article applying his pitch classification algorithm to Yovani Gallardo, Francisco Cordero, Chris Capuano, and Brian Shouse.
  • On September 12, I published “Mad Dog Mishmash“, an article classifying pitch types for Greg Maddux.
  • On September 12, Ike Hall published “A Side Project Perhaps“, an article with some thoughts on the PITCHf/x data set and questions that could be asked of it.
  • On September 13, Ike Hall published “Thinking about Calibration“, an article about PITCHf/x calibration procedures.
  • On September 13, Dan Fox published “Return of the Fish Eye“, an article updating his previous article on plate discipline.
  • On September 13, Josh Kalk published “Progress. Errrr, Sort of.“, an article updating the results from his pitch classification algorithm.
  • On September 13, Joe P. Sheehan published “The Other Side of the Pitch“, an article looking at BABIP strike zone charts for Vladimir Guerrero and Jason Kendall and also examining which hitters see which types of pitches most often.
  • On September 14, Bill Ferris published “Fish Eye on the Tigers“, an article about the Detroit Tiger hitters’ plate discipline.
  • On September 14, Josh Kalk published “Reds @ Brewers Pitching Preview“, an article applying his pitch classification algorithm to Tom Shearn, Kirk Saarloos, Matt Belisle, Ben Sheets, Jeff Suppan, and Carlos Villanueva.
  • On September 14, I published “In the Land of Submariners“, an article classifying pitch types for Chad Bradford.
  • On September 14, Jonathan Hale published “A.J. Burnett Pitch Analysis–Then and Now“, an article about pitcher A.J. Burnett.
  • On September 15, Harry Pavlidis published “Swing Low (Sweet Chariot) Geoff Jenkins“, an article about hitters’ contact rates and home runs on low pitches.
  • On September 15, Bill Ferris published “Jair Jurrjens 9/11 Start versus Texas“, an article examining his pitch breakdown and results from that start.
  • On September 16, Whither published “Gameday Pearl Radar” (Google translation of the title, sorry!), a Chinese-language article about pitch classification for Andy Pettitte, Daisuke Matsuzaka, Chien-Ming Wang, Josh Beckett, Roger Clemens, and Curt Schilling. The graphs are in English, so you might get something out of the article even if you can’t read Chinese.
  • On September 16, Steve West published “The Young Strike Zone, Part 3“, an article in his series examining strike zone charts for Michael Young.
  • On September 16, Harry Pavlidis published “Clusters“, an article about using k-means cluster analysis to classify pitch types.
  • On September 16, Harry Pavlidis published “Ted Lilly Clusters“, an article applying k-means cluster analysis to classify pitch types for Ted Lilly.
  • On September 17, Bill Ferris published “Jair Jurrjens 9/16 Start against the Twins“, an article examining his pitch breakdown and results from that start.
  • On September 17, Ike Hall published “More PITCHfx Thoughts“, an article with further thoughts about PITCHf/x calibration procedures and trajectory calculation.
  • On September 17, Harry Pavlidis published “Updated Script, Plus Some Extra SQL“, an article sharing code for his spider and parser and database structure for his hitter strike zone and pitch spin plots.
  • On September 17, Harry Pavlidis published “Arroyo Clusters“, an article classifying pitch types for Bronson Arroyo.
  • On September 17, I published “Simple Is Good“, an article classifying Zack Greinke’s pitch types and comparing his performance as a reliever and as a starter.
  • On September 19, Justin inAZ published “PITCHf/x Plots for Harang and Arroyo“, an article discussing pitch classification plots for pitchers Aaron Harang and Bronson Arroyo.
  • On September 19, Harry Pavlidis published “Tonight’s Opponent: Tom Shearn“, an article classifying pitch types for Tom Shearn.
  • On September 19, Harry Pavlidis published “Shearn Speed“, an article looking at start-to-start variance in pitch speed for Tom Shearn and whether it is a park and wind-related effect.
  • On September 19, John Walsh published “Pitch Identification Tutorial“, as its title indicates, a tutorial about pitch types, including pitch charts for about 150 pitchers.
  • On September 19, Josh Kalk published “Corrections to the Corrections?“, an article about looking for changes over time in his park corrections to the PITCHf/x data.
  • On September 20, Josh Kalk published “Brand New Player Cards“, an article with links to his new pitcher charts with normalized x-z initial points and accelerations, this time including home and road data.
  • On September 20, mb22414 published “Catching Up on All Things PITCHf/x“, an article about Jake Peavy’s pitch types.
  • On September 20, Jonathan Hale published “Jesse Litsch Is 22 Years Old“, an article looking at pitch types for three of Jesse Litsch’s starts.
  • On September 21, Joe P. Sheehan published “‘Breaking’ Away“, an article about methods of describing and quantifying pitch movement, or break, looking at Barry Zito’s pitch types with these methods, and listing pitchers with the largest break for each of the major pitch types.
  • On September 22, mb22414 published “Checking in on Pedro“, an article about pitcher Pedro Martinez’s performance since returning from surgery.
  • On September 22, Harry Pavlidis published “Hello Soto“, an article with a strike zone chart for Geovany Soto.
  • On September 22, Harry Pavlidis published “Local Kid, Probably a Sox Fan“, an article looking at pitch types for Tom Gorzelanny.
  • On September 24, Ike Hall published “More Calibration Thoughts“, an article with additional thoughts about PITCHf/x calibration procedures.
  • On September 24, Justin inAZ published “Could Jared Burton Be Another Mariano Rivera?“, an article with pitch classification plots from fellow author John Walsh for pitchers Homer Bailey, David Weathers, Jared Burton, Bill Bray, Todd Coffey, and Gary Majewski.
  • On September 25, Harry Pavlidis published “Up Next: Dan Barone“, an article about pitch Dan Barone, examining his pitch types using spin rate graphs.
  • On September 25, Jonathan Hale published “Jesse Litsch–What Went Right?“, an article about Jesse Litsch’s September 25th start.
  • On September 26, Harry Pavlidis published “Peskiest of the Fish“, an article about a Jeremy Hermida at bat on September 25th.
  • On September 26, Harry Pavlidis published “Peskiest of the Fish Part 2“, an article about two Jeremy Hermida at bats on September 25th.
  • On September 27, Dan Fox published “A Mailbag Double Play“, an article including updates to his Fish/Eye charts for hitters.
  • On September 27, mb22414 published “A New Jake Peavy for a Day“, an article about Jake Peavy’s September 26th start.
  • On September 27, Josh Kalk published “Player Cards for Batters Now Available“, an article announcing the availability of his batter strike zone charts and results by pitch type.
  • On September 28, Joe P. Sheehan published “Scouting Jake Peavy“, an article profiling pitcher Jake Peavy.
  • On September 29, Jonathan Hale published “Dustin McGowan–Dissection of a Masterpiece“, an article about Dustin McGowan’s May 28th and June 24th starts.

October 2007 (48 articles)

November 2007 (19 articles)

  • On November 1, John Walsh published “Don’t Blame Pedro“, an article classifying pitches and examining pitching strategies for Pedro Martinez.
  • On November 2, Joe P. Sheehan published “Pitching to the Hitter“, an article examining fastball pitch frequency seen by hitters based on their slugging ability.
  • On November 6, I published “Bend It like Beckett“, an article classifying pitches for Josh Beckett.
  • On November 12, Josh Kalk published “Explanation of the Correction Code“, an article describing his method for correcting park-related inconsistencies in the PITCHf/x data.
  • On November 12, Josh Kalk published “Classification Algorithm Explained“, an article explaining his algorithm for classifying pitches for his player cards.
  • On November 12, I published “Meanwhile, Beckett the Ranch…“, an article with strike zone charts by pitch type for Josh Beckett.
  • On November 14, Josh Kalk published “Web-based PITCHf/x Tool“, an article introducing a web-based tool to query his PITCHf/x database.
  • On November 15, I published “Appeasement“, an article classifying pitches for Joba Chamberlain.
  • On November 16, Joe P. Sheehan published “Predicting Pitches“, an article examining the percentage of fastballs thrown in different situations.
  • On November 18, I published “Swinging at Shoe Tops?“, an article with strike zone charts by pitch type for Joba Chamberlain and examining a PITCHf/x data error.
  • On November 20, Josh Kalk published “Anatomy of a Player: Tom Glavine“, an article classifying Tom Glavine’s pitches and charting the strike zone location of his fastballs.
  • On November 21, Jonathan Hale published “A Gentle Massage“, an article investigating whether better pitchers get more strike zone calls in their favor.
  • On November 23, Joe P. Sheehan published “Post-Thanksgiving Quickie“, an article about the probability of a sinking and non-sinking fastballs to be hit on the ground or in the air.
  • On November 26, Jonathan Hale published “Out of the Zone“, an article looking at out of strike zone swing tendencies for hitters.
  • On November 27, Jonathan Hale published “Garbage Picking“, an article looking at out of zone tendencies for Toronto Blue Jays hitters.
  • On November 27, John Walsh published “Butterflies Are Not Bullets“, an article examining pitcher Tim Wakefield.
  • On November 28, Jonathan Hale published “Missing Corners“, an article about the shape of the strike zone as actually called.
  • On November 28, Jonathan Hale published “A Zone of Their Own“, an article about the size of umpire strike zones.
  • On November 30, Joe P. Sheehan published “Dirty Jobs“, an article examining fastball percentage and pitch location in various ball-strike counts.

December 2007 (20 articles)

  • On December 3, Josh Kalk published “Web-based PITCHf/x Tool Help/Comment Page“, an article explaining the updates to the PITCHf/x query tool.
  • On December 3, Tom Goyne published “Breaking Down Adam Eaton’s Breaking Ball“, an article looking at the break on Adam Eaton’s curve.
  • On December 4, Josh Kalk published “Anatomy of a Player: Tim Lincecum“, an article classifying Tim Lincecum’s pitches and charting the strike zone location of his changeups.
  • On December 5, I published “What Does John Smoltz Throw?“, an article classifying pitches for John Smoltz.
  • On December 6, Harry Pavlidis published “Jose Ascanio“, an article characterizing pitches for Jose Ascanio.
  • On December 9, I published “Tales of the Cutter: Mariano Rivera“, an article classifying pitches and showing strike zone charts for Mariano Rivera.
  • On December 10, Joe P. Sheehan published “Dirty Jobs: Part 2“, an article looking at ball-strike percentages for fastballs thrown at different counts.
  • On December 13, Josh Kalk published “Anatomy of a Player: League Average Pitcher“, an article detailing the average pitch speeds and spin-induced break for major league fastballs, sinkers, and cutters.
  • On December 13, I published “Tales of the Cutter: An Analysis of Joakim Soria“, an article classifying pitches for Joakim Soria and showing his pitch mix and strike zone charts by pitch type and batter handedness.
  • On December 14, Joe P. Sheehan published “The Same Things“, an article about calculating similarity scores for pitches from different pitchers and a look at pitcher Jared Burton.
  • On December 17, Harry Pavlidis published “Winter Pie“, an article looking at what pitches Felix Pie saw and what he swung at.
  • On December 18, Dave Cameron published “Carlos Silva“, an article examining Silva’s pitching style based on Josh Kalk’s PITCHf/x data.
  • On December 19, Alan Nathan published “Effect of the Magnus Force in the PITCHf/x Tracking System“, an article deriving improved equations for the break and spin of a pitch due to the Magnus force, accounting for the effect of drag in the x and z directions.
  • On December 19, Jonathan Hale published “Waiting for Their Pitch“, an article about the pitch selection and swing data for all hitters from 2007.
  • On December 20, John Walsh published “Fastball, Slider, Changeup, Curveball–An Analysis“, an article detailing the league average speed and spin movement, usage by handedness and count, and results for pitches and balls in play for each of the four basic pitch types. This piece is an outstanding reference.
  • On December 21, Tom Goyne published “Breaking Down Adam Eaton’s Breaking Ball, Part II“, updating his previous article on the break of Adam Eaton’s curve.
  • On December 22, I published “Can We Classify Every Pitch?“, an article about the field of pitch classification using PITCHf/x data with a particular emphasis on my own work.
  • On December 23, Joe P. Sheehan published “Winter Wonderland“, an article showing how often each type of pitch is hit on the ground compared to what height it is thrown in the strike zone.
  • On December 30, Jake at BuccoBlog published “PITCHf/x, Beaver’s Culture, and Only 2 Days Left“, an article showing the pitch results for fastballs thrown by Pat Maholm, Ian Snell, Tom Gorzelanny, Matt Morris, and Zack Duke.
  • On December 30, Jake at BuccoBlog published “Dejan’s McLouth Pipe-Dream“, an article looking at Nate McLouth’s hitting performance against the slider.

January 2008 (12 articles)

  • On January 2, Prof Pepper published “Cosi’ Uguali, Cosi’ Diversi (Part 1)“, an Italian-language article looking for the most unique curveballs in major league baseball.
  • On January 3, I published “Tales of the Curve: An Analysis of Erik Bedard“, an article classifying pitches for Erik Bedard and showing his pitch mix and strike zone charts by pitch type and batter handedness.
  • On January 4, Joe P. Sheehan published “Old Man River“, an article looking at the performance characteristics of old pitchers versus young pitchers.
  • On January 5, Prof Pepper published “Cosi’ Uguali, Cosi’ Diversi (Part 2)“, an Italian-language article looking for the most unique fastballs in major league baseball.
  • On January 6, Harry Pavlidis published “Felix and Matt–Pitch Preferences“, an article showing pitches seen, swing rates, and contact rates by area of the strike zone for Felix Pie and Matt Murton.
  • On January 9, I published “Tales of the Changeup: An Analysis of Johan Santana“, an article classifying pitches for Johan Santana and showing his pitch mix and strike zone charts by pitch type and batter handedness.
  • On January 10, Joe P. Sheehan published “Grouping Maddness“, an article comparing the fastball and slider performance of hard-throwing and soft-tossing old and young pitchers.
  • On January 11, I published “A PITCHf/x Analysis of James Shields“, an article classifying pitches for James Shields and showing his pitch mix and strike zone charts by pitch type and batter handedness.
  • On January 13, Harry Pavlidis published “Byrd Pitch Preferences“, an article showing pitches seen, swing rates, and contact rates by area of the strike zone for Marlon Byrd, Felix Pie, and Matt Murton.
  • On January 14, I published “A PITCHf/x Primer“, an introduction and tutorial on using and understanding PITCHf/x data and finding resources for further study.
  • On January 15, Jonathan Hale published “PITCHf/x: A Look at Scott Rolen and Troy Glaus“, an article looking at the pitches that Rolen and Glaus saw in 2007 and the results for pitches they swung at.
  • On January 15, SG of RLYW published “Pitch F/X and Joba Chamberlain“, an article looking at the results of Joba Chamberlain’s pitches by pitch type.

Current article count is 252 through January 15.

The updated version of this catalog is now hosted by The Hardball Times.

In the week since I published and updated my catalog, there have been a few new articles published.

Our favorite PITCHf/x author, Joe P. Sheehan, has another good one in a long line of great articles.

  • On August 10, he published “Makin’ a Filter”, an article about an automated method for classifying all pitches into either fastball or off-speed and drawing some conclusions from the data about when each type of pitch is thrown.

Steve West at Go Rangers! has been cranking out the analysis:

Dr. Alan Nathan has published a very interesting paper on his Physics of Baseball site.

  • On August 8, he published “Analysis of PITCHf/x Pitched Baseball Trajectories” (PDF), a paper looking at Jon Lester’s start on August 3rd and classifying his pitches according to speed, spin magnitude, and spin direction. This technique shows important promise for pitch classification independent of release point measurement distance (y0). Plus there’s a lot of cool stuff on equations of motions for any other physicists out there.

We also welcome a new author to the PITCHf/x analysis fold in Chris Constancio.

Anthony has a short article up at Friar Watch.

Finally, ultxmxpx has updated his pitch classification page.

August 17 and August 25 updates:

Dan Fox has a new article up at Baseball Prospectus (subscription required).

Steve West has a new article at Go Rangers! .

Dave Cameron has a new article at U.S.S. Mariner.

Joe P. Sheehan has a new article at Baseball Analysts.

Once again we extend a welcome to a new author, this time Harry at his new blog Cubs F/X.

September 1 update:

Dan Fox has a couple new articles at various places.

  • On August 25, the Rocky Mountain SABR chapter published “Jimenez Delivers”, an article about Ubaldo Jimenez’s August 25th start.
  • On August 27, the BP Unfiltered blog published “Changeup Challenged”, an article classifying Billy Wagner’s pitches.

Steve West has a new article at Go Rangers!

  • On August 30, he published “Danks but No Danks”, an article looking at pitcher John Danks and classifying his pitches.

Harry Pavlidis has been cranking out the analysis at Cubs F/X.

Once again, a hearty welcome goes out as we welcome another PITCHf/x researcher to the fold: mb22414 from the Friar Forecast blog.

Cafe Whither has another Chinese-language article.

The updated version of this catalog is now hosted by The Hardball Times.

In the 2006 postseason, Major League Baseball introduced a feature they called Enhanced Gameday, based on the PITCHf/x camera system from Sportvision. Based in Mountain View, California, Sportvision is also the creator of the yellow first-down line that appears on football telecasts. The PITCHf/x cameras capture the speed and location of the pitched baseball throughout its flight to home plate. Dr. Alan Nathan has a good description of how the system works on his Physics of Baseball site. MLB has, for now, made this data accessible in the XML files freely available for download from its Gameday website.

This summer, a number of baseball analysts have begun using this new data to tackle questions heretofore out of the realm of the common researcher. Others have made brief summaries of the published research, but I haven’t seen a comprehensive catalog. What follows is an attempt at such a catalog. If I have overlooked anyone or left out any articles, please bring it to my attention. Order is not necessarily a reflection of importance, but I have tried to list the earliest and/or most groundbreaking work first.

(If you want a quick introduction to the field without having to read through all the articles below, I recommend John Walsh’s “In Search of the Sinker” and Joe P. Sheehan’s “More Fun with Enhanced Gameday”.)

First and foremost among these analysts is Joe P. Sheehan, who has published nine articles on the topic at Baseball Analysts, one at The Hardball Times, and one at his Juice of Jesus blog.

  • On February 28, he published “Fingerprinting Jeff Weaver”, an article about pitcher Jeff Weaver, classifying his pitches based on his performance in the 2006 playoffs with St. Louis.
  • On March 29, he published “Enhanced Gameday”, an article about various pitchers from the 2006 playoffs, looking at pitch location, release points, and classifying pitches for Mike Mussina.
  • On April 18, THT published “Another Look at Enhanced Gameday”, an article about pitch selection, velocity, and classifying pitches for Felix Hernandez and Kevin Millwood.
  • On April 19, he published “More Fun with Enhanced Gameday”, an article about consistency of pitch movement, location, and release points, and classifying pitches for John Lackey.
  • On April 26, he published “That Sinking Feeling”, an article about the two-seam fastball, examining pitchers Derek Lowe, Aaron Cook, Brandon Webb, and Carlos Silva.
  • On May 11, he published “Location, Location, Location”, tracking the location, BABIP, and swing percentage of pitches in different grid locations around the strike zone.
  • On May 25, he published “Dangerous Curves”, on the break of the curveball and pitchers Barry Zito and Rich Hill.
  • On June 14, he published “Ch-ch-ch-ch-changes…”, on the effectiveness of the changeup and pitchers Cole Hamels, Josh Beckett, Trevor Hoffman, and Johan Santana.
  • On June 28, he published “Is There Something in the Way It Moves?”, on pitcher Roy Halladay and the consistency of his stuff from start to start.
  • On July 13, he published “Under Pressure”, on pitchers Jake Peavy and Dan Haren and their pitch selection in high-pressure versus low-pressure situations.
  • On July 26, he published a collection of PITCHf/x-related notes under the title “Not an Article about Pitching at Altitude”. He discusses preliminary data about the effect of altitude on the break of pitches, and updates his BABIP charts from “Location, Location, Location”.

Another major researcher in the field is Dan Fox, author of the Schrodinger’s Bat column at Baseball Prospectus and the Dan Agonistes blog. Most of his work is available for BP subscribers only. His June-July series on Hernandez, Wakefield, and Matsuzaka is a great primer on classifying pitches.

A third important contributor is John Walsh, a nuclear physics professor at the Istituto Nazionale di Fisica Nucleare in Pisa, Italy. He has published several articles at The Hardball Times:

  • On June 6, THT published “In Search of the Sinker”, one of the definitive articles on classifying pitches. In this process John examines the sinking fastball and pitcher Randy Wolf.
  • On June 26, THT published “Schilling’s Aching Schoulder”, an article about detecting Curt Schilling’s shoulder injury in the Enhanced Gameday data.
  • On July 11, THT published “Strike Zone: Fact vs. Fiction”, an article about the strike zone, as called by the umpires, versus right-handed and left-handed batters.
  • On July 25, THT published John’s followup article “The Eye of the Umpire”, containing some refinements to the previous article. The pair of articles are an excellent beginning to strike zone analysis.

Next we come to John Beamer, author of a couple articles at The Hardball Times:

Over at the Go Rangers! blog, Steve West is another PITCHf/x researcher.

  • On June 14, he published “Rotation Release Points”, an article about the release point consistency of the starting rotations of Texas, Anaheim, and Oakland.
  • On June 18, he published “Rangers Rotation Pitch Types”, an article classifying the pitch types of Texas pitchers Kevin Millwood, Brandon McCarthy, Kameron Loe, Vicente Padilla, and Robinson Tejeda.
  • On June 25, he published “Rangers Rotation Release Points Redux”, an article examining whether the Texas starters were tipping their pitches by varying release points.
  • On July 12, he published “Pitch Break Angle vs Length”, and article about classifying pitch types using these two new PITCHf/x parameters. This article is a useful complement to the pitch classification work of Fox, Walsh, and Beamer.
  • On July 30, he published “Do Pitchers Affect the Strike Zone”, a look at batted ball results plotted against pitch location in the strike zone.

Next up is Bill Ferris at the Detroit Tigers Weblog with a few articles on Tiger pitchers. Because Bill is so prolific a blogger, I may have missed something of his on the topic.

Louis Chao has one article on The Hardball Times. Hat tip to Whither for pointing me to his first Chinese-language article at Andre’s Baseball Blog.

  • On June 26, he published, in Chinese, “Diggin’ in on the Sinker”, an article looking at sinkerball pitchers. Putting this article through Google Translate to English makes it clear why that tool is still in beta. ;)
  • On July 12, THT published “Another Look at the Sinker”, an article comparing the two-seam and four-seam fastballs and looking at pitcher A.J. Burnett.

At the beansTown blog, Steve Calcagno has one article.

Over at the U.S.S. Mariner, Dave Cameron has one article using Enhanced Gameday.

A Devil Rays’ fan who posts around the web as ultxmxpx has a website where he posted some Enhanced Gameday pitch analysis.

  • On June 3, he posted “Shields/Kazmir pitch selection” as a topic on the RaysBaseball forum.
  • On July 10, he published this list of pitchers and contact rate on their various pitches, which he had classified.

Anthony has Enhanced Gameday stuff scattered here and there throughout his blog at Friar Watch.

There are also some other Chinese language articles on this topic. I wish I could understand a bit more than what I can gather from Google translations, but I’ll present them here for those of you who do know Chinese.

Even if you’re an English speaker, you might be able to gather something from the Google translation and the graphs at Cafe Whither. Thanks to Whither for the first link.

And here are a couple other Chinese language articles.

I hope to contribute a little of my own work in the near future, but I felt the right place to start this discussion was with a recap of what has been done. Enjoy!

Update: New articles listed in this post.

Full list of articles by author.

Full list of articles by date.

Articles about pitchers listed by pitcher.

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