Shohei Ohtani, Dean Kremer, and Fastballs That Aren’t as Fast as Other Fastballs

There are two predominant fastball types in the majors these days: the four-seamer and the sinker. The cutter usually gets categorized as a fastball too, and for some pitchers, like Corbin Burnes and Kenley Jansen, it certainly is one. Then again, most pitchers use their cutter as a secondary or tertiary offering, and the average cutter comes in at 89 mph; that’s closer to the average changeup than the average four-seamer. The cutter defies simple classification. Then there’s the split-finger fastball, which is nothing more than a misnomer. It’s an offspeed pitch, no doubt about it, and therefore “splitter” is the more widely accepted label nowadays.
So, back to those two fastballs. The four-seamer is essentially the “throw it as hard as you can” ball; if you hear someone use the generic term “fastball” to describe a particular pitch, this is the one they’re talking about. In terms of grip, a four-seamer isn’t all that different from the way any other fielder throws the baseball. The sinker, on the other hand, is a more specialized weapon. As the name suggests, it has more movement than a four-seam fastball, and it’s more useful for inducing weak contact than blowing the ball past the opposing batter. Yet, modern pitchers have been taking that “throw it as hard as you can” approach with their sinkers as well. Over the past four seasons, the average sinker is only 0.6 mph slower than the average four-seamer.
Thus far in 2023, 52 starting pitchers have crossed the 50-inning threshold while using both a four-seam fastball and a sinker at least 3% of the time. Of those 52, 83% throw both pitches within 1 mph of one another. All but two throw both pitches within 2 mph of one another. As you might have guessed, I’m here to write about the two exceptions, the two starting pitchers who throw their four-seamer and sinker nearly 3 mph apart: Shohei Ohtani and Dean Kremer. Read the rest of this entry »








