Quote:
Originally Posted by X3NEIZE
What you really want to look at is K's and BB with each pitcher and the deltas between CatcherB with the same pitchers over a good number of games, but there's no report for that, it's all manually done.... with xls 
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I did this with my catchers (Berra and Piazza) with a sample of 20-25 games each using the same pitchers. It's a small sample size but it was interesting anyway. In every case, the pitchers had more walks per 9 IP with Piazza, and it was significant in most cases. The total of all pitchers was 1.7 BB/9 with Berra catching and 3.2 BB/9 with Piazza.
Piazza is now at DH and Jason Kendall is my new backup catcher.