STARTERS: Pitch mix changes, 2012 vs. 2013
Aug 11 2013
The pitch mix of starting pitchers can have a direct correlation with their success, or lack thereof.
If a SP has changed his pitch mix significantly, it can help to explain why his skills may have changed from one year to the next.
First, let's set some pitch mix baselines based on PITCHf/x data.
As you might expect, four-seam fastballs are the most common pitch thrown by starting pitchers. Here is the average pitch mix distribution for starting pitchers:
For reference, here are the average velocities in mph associated with each pitch type:
Now let's use those baselines to identify pitch mix changes worth noting this season.
Here are the SPs whose pitch mix has changed the most from 2012 to date in 2013, with BPV variation...
Almost!
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