What If Clayton Kershaw Weren’t So Predictable?
Clayton Kershaw is the best pitcher on the planet.
You’re probably aware of his ability, and his hardware, which includes three Cy Young Awards, six straight top-five Cy Young finishes and an NL MVP trophy. But here’s the thing: he could be better.
Consider this fascinating nugget unearthed by Daren Willman:
Clayton Kershaw never threw a curveball when he was behind in the count last season… That's pretty crazy pic.twitter.com/vYSotPuzir
— Daren Willman (@darenw) February 27, 2017
Kershaw, as Willman notes, never threw a curveball when behind in the count last season. And that’s not all: as Jeff Zimmerman discovered in a December post at RotoGraphs, Kershaw has also been reluctant to employ his other breaking pitch, the slider, in hitter’s counts. A visualization made by Zimmerman of Kershaw’s pitch mix by count reveals the difference between it and the balanced approach utilized by Johnny Cueto. Cueto is willing to throw almost any pitch in any count. Kershaw, on the other hand, becomes extremely reliant on his fastball when he falls behind.

Overall, Kerhsaw threw curveballs at a 15.6% rate last season and at 13.2% rate for his career. It’s his third pitch, but it is also his greatest velocity-separation offering. He rarely throws a changeup. But while Kershaw rarely throws his slider in hitter’s count, he never throws his curveball.
And it’s not just fluky, one-year, phenomenon. Here are the total number of curveballs Kershaw has thrown in his career when facing a 1-0 count…

