Don Cooper on Pitch Usage and Percentages
Should pitchers throw their “best pitch” a higher percentage of the time? I asked that question a number of times this past season, but with a qualifier. Fastballs — most everyone’s primary offering — weren’t the focal point. Secondary pitches were. Think Lance McCullers’ curveball (which he threw roughly 50% of the time this year). Andrew Miller’s slider (61%). Deolis Guerra’s changeup (45%). Zach Putnam’s splitter (68%). Would it behoove more hurlers to up their usage in a similar fashion?
White Sox pitching coach Don Cooper is one of the people with whom I broached the subject. Our conversation came in mid-summer, at Fenway Park, one day after Putnam threw 15 splitters in a 20-pitch relief outing.
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Cooper on Zach Putnam: “He’s coming in for one, maybe two innings. We want him to command his fastball. But his fastball is not the reason he’s in the big leagues. His split is. If we’re going to win or lose a game, it’s going to be on the split more often than not. He uses the fastball to locate, and get them off splits. He uses it to protect the split.
“He’s on the DL right now, because he’s had some difficulty recovering, but listen, we’re not bringing him in to throw fastballs. If that’s what we wanted, we’d leave the starter in, because I guarantee you that whatever starter we have in has a better fastball. We’re bringing him in because his best pitch is the split. He’s been striking out a guy an inning, and he hasn’t been doing it with fastballs.