research director at the American Sports Medicine Institute, Glenn Fleisig, conducted a biometric analysis of 28 professional pitchers throwing from the windup and stretch. There is a long-standing supposition persisting in the baseball community that pitching out of the stretch causes more arm strain and reduces velocity, two postulates we now know-thanks to science-are false. “It’s all just minimizing the amount of movement you have in your mechanics, and it’s really paid off.” “Just trying to keep things as simple as possible,” the Mets’ Syndergaard, the hardest-throwing starter in baseball, said. Since the start of 2013, Miller has a 2.01 ERA and has struck out 14.9 batters for every nine innings pitched, nearly doubly the league-wide average of 7.7 K/9 during that time.
“Why not? What do I have to lose at this point?” Miller recalled thinking. Valentine said the windup was, by then, “an archaic idea.” Rather than learn and hone two separate types of mechanics-the stretch and the windup-Miller could streamline his long-limbed contortions and focus only on the stretch. “That’s how you’re going to throw every pitch this year.” “What the hell are you doing the rest of this stuff for?” Valentine said.
His manager at the time, Bobby Valentine, took immediate notice. His first pitch was right on target and popped the catcher’s mitt. To simplify his mechanics, Miller decided to switch to the stretch, a reduced and halting motion used with runners on base.
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