Arizona Diamondbacks
Casey Kelly has thrown 2,953 pitches that have been tracked by the PITCHf/x system between 2011 and 2025, including pitches thrown in the MLB Regular Season and Spring Training. In 2025, they have relied primarily on their Sinker (89mph), Slider (83mph) and Fourseam Fastball (90mph), also mixing in a Curve (79mph) and Change (84mph).
In 2025, compared to other RHP:
Their sinker is basically never swung at and missed compared to other pitchers' sinkers, has below average velo, has less armside run than typical, results in somewhat more groundballs compared to other pitchers' sinkers and has some natural sinking action. Their slider has primarily 12-6 movement, results in somewhat more groundballs compared to other pitchers' sliders and has some two-plane movement. Their fourseam fastball has below average velo, has less armside movement than typical, has some natural sinking action and results in somewhat more groundballs compared to other pitchers' fourseamers. Their curve has primarily 12-6 movement, has little depth and results in somewhat more flyballs compared to other pitchers' curves. Their change generates fewer whiffs/swing compared to other pitchers' changeups, results in somewhat more flyballs compared to other pitchers' changeups and has some natural sink to it.