Matt Harrison's Dead Fish

At the top of his game, Tom Glavine owned a reverse platoon split.  His statistics would show him more effective against right-handed batters than left-handed batters, despite Tom throwing from the left side.  During my time at ESPN in the 1990s, I asked both Ray Knight and Greg Olson (Glavine's former catcher) why Tom owned that split.  Both gave the same answer, both calling Glavine's off-speed pitch, "a dead fish," one that moved away from right-handed batters.

Matt Harrison is showing a reverse platoon this season.  In his first three years in the majors, Matt produced a normal left/right split.  As you can see, his off-speed pitches to right-handers came in pretty straight, even coming a little in on righties:

Matt Harrison, off-speed pitch movement, 2008-2010.This season, those pitches started moving away from the righties:

Matt Harrison, off-speed pitch movement, 2011.He's shutting down right-handed batters so far this season, holding them to a .135/.224/.192 slash line.  He's showing righties something different, and they have yet to adjust to the change.