Los Angeles Angels
Robert Stephenson has thrown 6,463 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 Cutter (87mph) and Fourseam Fastball (96mph), also mixing in a Slider (85mph). He also rarely throws a Change (87mph).
In 2025, compared to other RHP:
Their cutter generates an extremely high number of swings & misses compared to other pitchers' cutters, has heavy sink and is an extreme flyball pitch compared to other pitchers' cutters. Their fourseam fastball has some natural sinking action, has well above average velo and has slight armside run. Their slider (take this with a grain of salt because they've only thrown 12 of them in 2025) generates an extremely high number of swings & misses compared to other pitchers' sliders, is an extreme flyball pitch compared to other pitchers' sliders, has primarily 12-6 movement and has some two-plane movement. Their change (take this with a grain of salt because they've only thrown 2 of them in 2025) is basically never swung at and missed compared to other pitchers' changeups, is much firmer than usual and results in more flyballs compared to other pitchers' changeups.