Arizona Diamondbacks
Merrill Kelly has thrown 13,235 pitches that have been tracked by the PITCHf/x system between 2019 and 2024, including pitches thrown in the MLB Regular Season, the MLB Postseason, The World Baseball Classic and Spring Training. In 2024, they have relied primarily on their Fourseam Fastball (92mph) and Cutter (91mph), also mixing in a Change (89mph), Slider (86mph), Sinker (93mph) and Curve (82mph).
In 2024, compared to other RHP:
Their fourseam fastball generates a 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 and has essentially average velo. Their cutter is an extreme flyball pitch compared to other pitchers' cutters, has well above average velo, has good "rise" and has little cutting action. Their change is thrown extremely hard, dives down out of the zone, results in somewhat more groundballs compared to other pitchers' changeups and has slight armside fade. Their slider generates more whiffs/swing compared to other pitchers' sliders, has primarily 12-6 movement and has some two-plane movement. Their sinker results in more flyballs compared to other pitchers' sinkers and has some natural sinking action. Their curve is basically never swung at and missed compared to other pitchers' curves, is much harder than usual and has a sharp downward bite.