Boston Red Sox
Zack Kelly has thrown 1,903 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 Fourseam Fastball (96mph), Slider (82mph) and Cutter (92mph), also mixing in a Change (84mph) and Sinker (95mph).