Boston Red Sox
Zack Kelly has thrown 1,742 pitches that have been 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 have relied primarily on their Cutter (91mph), Fourseam Fastball (95mph) and Slider (81mph), also mixing in a Sinker (95mph) and Change (83mph).