Ronald Acuña, Perpetually Greenlit
Ronald Acuña Jr. unlocked a new offensive gear this year. He already had speed and power — he was only three stolen bases short of a 40/40 season in 2019, his first full season in the majors. That wasn’t an option this year, what with a 60-game slate, but what he did do is even more impressive: he started walking.
Acuña’s 18.8% walk rate was the fourth-highest in the major leagues. He drew walks at a higher rate than Carlos Santana, Joey Votto, and Mike Trout. This wasn’t some intentional walk mirage, either; it’s not often a great idea to walk the man batting in front of Freddie Freeman, and Acuña drew only two freebies all year. Instead, he came by it the regular way: he’s such a fearsome hitter that pitchers avoided the strike zone, and he started laying off more pitches that missed their mark.
That’s easier said than done — otherwise every hitter would be doing it. Acuña managed it, though. He didn’t do it magically; rather, he cut back on his swing rate everywhere. He swung less at pitches over the heart of the plate, and thinking “swing less often” let him cut back in every other region:
Attack Zone | 2019 Swing% | 2020 Swing% |
---|---|---|
Heart | 78% | 73% |
Shadow | 50% | 45% |
Chase | 18% | 13% |
Waste | 4% | 4% |
This newfound equilibrium presented a conundrum for opposing pitchers. Stay out of the zone, and you’re liable to put a stolen base threat on with Freeman batting next. Get too familiar, and you might get acquainted with Acuña’s 99th percentile hard hit rate. It’s a puzzle with no good answers.
Last year, Acuña had another wrinkle to his plate discipline game: he swung more than anyone else on 3-0. It was just another thing to think about: think of 3-0 as an automatic strike with the batter taking, and you were throwing batting practice to one of the best hitters in the game. Read the rest of this entry »