Pitching is part art and part science. Pitching analysis is no different. At Brooks Baseball, we strive to present the most complete, accurate, and comprehensive dataset about pitching available on the web. To do that, we start with the PITCHf/x dataset, a public resource made available by MLBAM and Sportvision, and make systematic changes that improve the quality, usefulness, and useability of that data.

Pitch Classifications by Pitch Info
The PITCHf/x data downloaded from MLBAM contains a set of pitch classifications determined by an automated, real-time, neural network algorithm. While this has the advantage of providing very fast labels that can inform broadcasts and products such as MLB Gameday, such automated classifiers have difficulty with certain repertoires and pitch types.

The Pitch Classifications used by Brooks Baseball are manually reviewed by Pitch Info using several parameters of each pitch's trajectory and double-checked against several other sources, such as video evidence (e.g., pitcher grip and catcher signs) and direct communication with on-field personnel (e.g., pitching coaches, catchers, and the pitchers themselves).

Realistic Trajectory Data
Because the PITCHf/x dataset provides the details of each pitch's trajectory, we can slightly alter the default values to align better with reality than what is commonly reported. For example, we slightly shift our reported values back to a release distance of 55' - which more closely reflects the actual release distance of most pitchers - so that release points are more tightly clustered and velocities are slightly increased. We also provide options to visualize pitch movement with gravity added back into the equation or with the effects of air drag removed.

Dan Brooks is an experimental psychologist at Tufts University, where he studies avian visual cognition. He lives in Brookline, MA with his wife Marilyn (who still wears her pink Sox hat proudly) and dog Teddy (who wishes they would hold Bark in the Park at Fenway, even if he'd probably spend all game eating peanuts off the floor). For baseball, research, media, or other questions, he can be contacted at dan@brooksbaseball.net, or followed @brooksbaseball

Harry Pavlidis, a Chicagoan, is the founder of Pitch Info and Director of Technology for Baseball Prospectus, where he provides a regular column featuring PITCHf/x based scouting and analysis. Harry is a graduate of Syracuse University with more than fifteen years experience in developing online and mobile applications - for things not even related to baseball, too. He can be contacted at harry@pitchinfo.com, or followed @harrypav

Dan Rozenson is a Washington-based "young professional" and graduate student in international security. He is a research assistant for Baseball Prospectus and assures the quality of pitch classifications on Brooks Baseball. Dan is also a writer for Beyond the Box Score on PITCHf/x and other sabermetric topics. He can be contacted at rozenson@gwmail.gwu.edu, or followed @SixToolPlayer

Extended Credits

Data and Services