(*) STARTERS: Pitch Movement—Part I

The implementation of the PITCHf/x system in the 2006 MLB playoffs and 2007 MLB regular season has allowed for the systematic collection of pitch velocity and movement.

While this data can add more to our analytical toolbox, the analysis of it is still an evolving process.

After all, pitch movement by itself doesn't really tell us much. The effectiveness of pitch movement varies by pitch type. It also differs based on the handedness of the batter.

Likewise, the amount of pitch movement does not have the same effectiveness for every pitch. For example, a small, late break of a slider might be just as or more effective than one with more movement.

In addition, some pitches benefit more from vertical movement than they do from...

Almost!

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