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Thursday, August 23, 2007


My column today on Baseball Prospectus deals with using PITCHf/x data to visualize the trajectory of pitches in much the same way as the actual Gameday application shows each pitch during the game. After discussing how this can be done and plotting a few individual pitches I then aggregate pitch types for a few individuals including Rich Hill, Barry Zito, Roy Halladay, and Derrek Lowe to form a "visual pitch profile" that can be used for comparison. Finally, I look at the complete repertoire of Daisuke Matsuzaka.

After the article was submitted for publication I learned that SABR member Mat Kovach has also been doing this kind of thing.

Update: Just saw that Joe P. Sheehan had done something very similar last week at Baseball Analysts. You know what they say about great minds... :)

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