Do baseball's hardest-throwing pitchers have another gear in them?

Mason Miller was fresh off the 2021 MLB draft, a newly-minted third-round pick for the Athletics. Aroldis Chapman was still an unheralded teenager who had yet to defect from Cuba. Seth Hernandez was a rising high school senior in California. And Jacob Misiorowski was pitching in the JUCO World Series.Individually, they were at different points in their lives. Collectively in these moments, though, they all shared the same experience: the first time they reached 100 mph on a pitching mound.“Whoa,” Hernandez recalled thinking, as triple digits flashed across the board.Reaching the 100-mph marker is no simple feat. It is a test of what the human body is capable of — arms rearing back then whipping forward, 60 feet, six inches from home plate. These days, though, modern pitchers continue to hi