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Toronto Blue Jays starting pitcher Trey Yesavage throws during the first inning of a baseball game against the Toronto Blue Jays, Sunday, Sept. 21, 2025, in Kansas City, Mo. (AP Photo/Charlie Riedel) Copyright 2025 The Associated Press. All rights reserved. There’s no mystery about what Toronto Blue Jays rookie starter Trey Yesavage is going to throw tonight in Game Six of the American League Championship Series. The only question is whether the Seattle Mariners can touch it. Yesavage has turned heads this postseason with a split-finger fastball—known colloquially as a splitter—that’s unhittable when he’s commanding it well. Such was the case in his playoff debut against the New York Yankees, when he threw 5 1/3 no-hit innings with just one walk and 11 strikeouts. It wasn’t working as well in his next outing—ALCS Game Two against Seattle—when he allowed five runs in four innings. Yesavage is the latest Blue Jays pitcher to rely heavily on his splitter. It’s still a lightly-used pitch across MLB, but it’s frequency has nearly doubled over the last four years from 1.6% in 2022 to 3.0% in 2025. Toronto pitchers throw far more of them than anyone else, leading MLB with a 9.4% splitter usage rate. No other team in MLB threw the pitch more than 7.7% of the time, and eight teams used it less than 1.0%. A splitter is an offspeed pitch, designed to look like a fastball out of the pitcher’s hand, but with deceptively slower speed and sharp downward movement. It’s especially effective for pitchers with an over-the-top arm angle, and can be a a better weapon for certain pitchers than a changeup, which is the most common offspeed pitch in MLB. Splitters are much more popular in the Japan, South Korea, and Taiwan, so players who come to MLB from…

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Filed under: News - @ October 19, 2025 3:21 pm