Non-MLB
Jackson Stephens has thrown 3,639 pitches that have been tracked by the PITCHf/x system between 2017 and 2024, including pitches thrown in the MLB Regular Season and Spring Training. In 2024, they have relied primarily on their Sinker (92mph) and Cutter (90mph), also mixing in a Fourseam Fastball (93mph), Curve (76mph), Slider (87mph) and Change (86mph).
In 2024, compared to other RHP:
Their sinker generates an extremely high number of swings & misses compared to other pitchers' sinkers, results in many more groundballs compared to other pitchers' sinkers and has some natural sinking action. Their cutter generates an extremely high number of swings & misses compared to other pitchers' cutters, results in many more groundballs compared to other pitchers' cutters and has slightly above average velo. Their fourseam fastball has some natural sinking action, has essentially average velo and has slightly less natural movement than typical. Their curve is basically never swung at and missed compared to other pitchers' curves, has sweeping glove-side movement, results in more flyballs compared to other pitchers' curves, has a sharp downward bite and has slightly below average velo. Their slider results in somewhat more flyballs compared to other pitchers' sliders and has some two-plane movement. Their change dives down out of the zone, generates fewer whiffs/swing compared to other pitchers' changeups, is slightly firmer than usual and results in somewhat more flyballs compared to other pitchers' changeups.