Locke St. John and the Lateral Movers

Last week, I wrote about the handful of pitchers who drop their release points significantly when facing same-sided batters. Today I’m going to highlight a few who change their release points by a different method. Before we get to them, I’d like to talk a bit about why anybody would risk messing with their release point in the first place. This is an article about the potentially transformative power of scooching over.
I started thinking about arm angles with a very blunt test. For the last seven years, I pulled every pitcher’s average release point and their wOBA against lefties and righties, then calculated the correlation between them. I also pulled average velocity as a control variable of sorts. The correlation coefficients are small, but they line up with what we’d expect:
Handedness | Velocity | Horizontal Release Point | Vertical Release Point |
---|---|---|---|
Same Side | -.15 | -.11 | .15 |
Opposite Side | -.22 | .13 | -.01 |
Unsurprisingly, it’s always good to throw the ball hard. Against same-sided batters, pitchers who release the ball lower and wider fare better. Against opposite batters, a wide release point is associated with poor results. Read the rest of this entry »