I posted a brief evaluation of the MLBAM pitch classification algorithm on the THT Live blog. So far I am not impressed with the system, but maybe there is hope for some improvement.
Update 4/11: Dan Fox reports that some improvements have been instituted for the MLB classification system this week. I’m in the process of taking a look at some data for a few other pitchers. This new data set includes a few starts from Thursday, April 10, which I believe should be covered under the improved algorithm that incorporates information about the pitches in a pitcher’s repertoire. I’ll report back if and when I learn something from this study.