Lies, Damn Lies, and Year-to-Year Correlation
I’m going to spend about half this article trying to deceive you. I just thought you should know that upfront. Why? Alex Chamberlain wrote a wonderful article about Kyle Hendricks yesterday, and it reminded me of one of my favorite paradoxical findings about pitching. Now, I’m going to use that finding to bamboozle you — or at least, that’s the plan.
Hendricks, you see, is spectacular at throwing pitches in the shadow zone, the boundaries of the strike zone and the area just outside of it. That’s an obviously useful skill. When you watch a pitcher painting the corners, it doesn’t just feel like hitters are unlikely to make solid contact, it’s actually true. Batters have worse outcomes on the borderline part of the plate than in any other zone.
Here’s a statement that I don’t think is at all controversial: pitchers exercise a lot of control over where they throw the ball. It’s not like exit velocity — mostly batter-controlled — or walk rate, which depends on myriad factors that both pitcher and batter affect. Where a pitcher throws the ball should be up to, well, the pitcher.
It stands to reason that if pitchers control where the ball goes, there will be leaders and laggards at it. As it turns out, there are! As Chamberlain pointed out, no one has thrown a higher percentage of their pitches in the shadow zone (since 2015) than Kyle Hendricks; Marco Gonzales is narrowly behind in second place. Sure sounds like a skill to me. Read the rest of this entry »