Arizona Diamondbacks
J.P. Feyereisen has thrown 2,629 pitches that have been tracked by the PITCHf/x system between 2020 and 2025, including pitches thrown in the MLB Regular Season, The World Baseball Classic and Spring Training. In 2025, they have relied primarily on their Fourseam Fastball (91mph) and Slider (83mph), also mixing in a Change (87mph).
In 2025, compared to other RHP:
Their fourseam fastball has much less armside movement than typical, has some natural sinking action, results in somewhat more groundballs compared to other pitchers' fourseamers and has slightly below average velo. Their slider has exceptional depth, is an extreme flyball pitch compared to other pitchers' sliders and generates fewer whiffs/swing compared to other pitchers' sliders. Their change is basically never swung at and missed compared to other pitchers' changeups, dives down out of the zone, results in more flyballs compared to other pitchers' changeups and is slightly firmer than usual.