Boston Red Sox
Although they have not thrown an MLB pitch in 2026, Zack Kelly threw 2,829 pitches that were tracked by the PITCHf/x system between 2022 and 2025, including pitches thrown in the MLB Regular Season, Spring Training and Independent Leagues. In 2025, they relied primarily on their Cutter (91mph) and Fourseam Fastball (96mph), also mixing in a Slider (81mph), Sinker (96mph) and Change (83mph). He also rarely threw a Curve (82mph).