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.