Boston Red Sox
Zack Kelly has thrown 901 pitches that have been tracked by the PITCHf/x system between 2022 and 2024, including pitches thrown in the MLB Regular Season and Spring Training. In 2024, they have relied primarily on their Fourseam Fastball (96mph), Slider (83mph) and Change (84mph), also mixing in a Cutter (91mph).
In 2024, compared to other RHP:
Their fourseam fastball generates an extremely high number of swings & misses compared to other pitchers' fourseamers, is an extreme flyball pitch compared to other pitchers' fourseamers, has some natural sinking action, has well above average velo and has slight armside run. Their slider sweeps across the zone and generates fewer whiffs/swing compared to other pitchers' sliders. Their change has an obvious armside fade, dives down out of the zone and results in somewhat more flyballs compared to other pitchers' changeups. Their cutter generates an extremely high number of swings & misses compared to other pitchers' cutters, has heavy sink, generates a very high amount of groundballs compared to other pitchers' cutters and has slightly above average velo.