All PFX data is from 2008. Unlike in the Randy Johnson FX post, I cleaned up some of the pitch-types for Zito this time around. The first plot is the familiar movement plot that you’ll often see with PFX data. The second plot is movement based on velocity. It’s very crude — I broke everything into 5mph chunks — but kinda interesting. By PFX in 2008, Zito’s hardest thrown fastball was clocked at 89.4mph. His average fastball was clocked at just a hair past 85mph.
(FC stands for a cut-fastball. The MLBAM algorithm stinks at identifying cut-fastballs, so you can basically ignore the small group of cutters that PFX thinks Zito threw last season. They mostly look to be sliders. I didn’t remove them because I’m lazy.)