Los Angeles Angels
Robert Stephenson has thrown 6,581 pitches that have been tracked by the PITCHf/x system between 2014 and 2025, including pitches thrown in the MLB Regular Season and Spring Training. In 2025, they have relied primarily on their Slider (87mph) and Fourseam Fastball (96mph), also mixing in a Change (88mph). He also rarely throws a Cutter (90mph).
In 2025, compared to other RHP:
Their slider generates more whiffs/swing compared to other pitchers' sliders, results in more flyballs compared to other pitchers' sliders, is much harder than usual, has primarily 12-6 movement and has some two-plane movement. Their fourseam fastball generates fewer whiffs/swing compared to other pitchers' fourseamers, has well above average velo, results in somewhat more flyballs compared to other pitchers' fourseamers and has slight armside run. Their change (take this with a grain of salt because they've only thrown 14 of them in 2025) is much firmer than usual and results in more flyballs compared to other pitchers' changeups. Their cutter (take this with a grain of salt because they've only thrown 2 of them in 2025) generates an extremely high number of swings & misses compared to other pitchers' cutters, is an extreme flyball pitch compared to other pitchers' cutters, has surprisingly little cutting action and has slightly above average velo.