Boston Red Sox
Although they have not thrown an MLB pitch in 2024, Zack Kelly threw 534 pitches that were tracked by the PITCHf/x system between 2022 and 2023, including pitches thrown in the MLB Regular Season and Spring Training. In 2023, they relied primarily on their Fourseam Fastball (95mph), Change (82mph) and Slider (87mph).
In 2023, compared to other RHP:
Their fourseam fastball generates a very high amount of groundballs compared to other pitchers' fourseamers, has some natural sinking action, has slight armside run and has slightly above average velo. Their change has an obvious armside fade, results in somewhat more flyballs compared to other pitchers' changeups and has some natural sink to it. Their slider results in somewhat more flyballs compared to other pitchers' sliders.