Who’s the Worst Secondary Pitch Hitter (Among Good Hitters)?

At its core, hitting is about hitting fastballs. I’m not sure that’s a good thing – pitchers don’t throw as many fastballs as they used to, because they know that hitters are hunting fastballs. Look at the aggregate data, though, and it’s clear. So far this year, batters are 93 runs above average against fastballs, and naturally enough, 93 runs below average against all other pitches. Last year, they were 344 runs above average against fastballs. It’s a consistent pattern throughout baseball history. Ask a hitter, and they’ll probably tell you the same thing. You make your paycheck on fastballs, and you hope not to spend it all on everything else.
That’s not to say that it applies to all hitters equally. Mike Trout is a good secondary pitch hitter – he’s a great hitter overall. Rafael Devers might be a better secondary pitch hitter than he is a fastball hitter. The archetype exists, because, well, good hitters are good.
The opposite is true as well. Max Muncy has done almost all of his damage against fastballs throughout his career. So has Joey Votto, surprisingly enough – from 2018 to now, he’s been five runs below average against sliders, curveballs, changeups, and splitters combined. There’s no one way to be a great hitter – you can tattoo fastballs and live with the damage from everything else, hunt everything else and survive against fastballs, or find some happy medium.
I thought it would be fun to figure out who most embodies this “baseball is about hitting fastballs” lifestyle. In other words, I’m looking for a hitter who is good overall, but incredibly poor at handling secondary pitches. It won’t do to find someone who’s bad at hitting sliders because they’re just bad at hitting; Billy Hamilton is the worst slider hitter in baseball over the past five years (by run value per pitch seen), but well, he wasn’t in the majors for his hitting. Read the rest of this entry »