Fangraphs: Pitchers Adjustments to Catchers

[weams]

http://www.fangraphs.com/community/do-pitchers-adjust-to-their-receivers-strengths-and-weaknesses/

For the purposes of this article, I'm concerned with the relative ability of receivers to preserve and gain strikes in different parts of the zone. As such, I'm going to categorize all pitches as "high in-zone" (in zones 1, 2, and 3), "high out-zone" (11 and 12), "low in-zone" (zones 7, 8, and 9), and "low out-zone" (13 and 14). It is a little unfortunate that this doesn't pick up the relative horizontal skill of receivers, but these divides should still allow for some real differentiation between catchers while also keeping our sample sizes large-ish. If we pick too narrow a slice of the zone, the results might get a bit iffy.