Seattle Mariners
Jackson Kowar has thrown 2,980 pitches that have been tracked by the PITCHf/x system between 2020 and 2025, including pitches thrown in the MLB Regular Season and Spring Training. In 2025, they have relied primarily on their Fourseam Fastball (98mph) and Slider (86mph), also mixing in a Change (87mph).
In 2025, compared to other RHP:
Their fourseam fastball is blazing fast, has some natural sinking action and has slight armside run. Their slider generates an extremely high number of swings & misses compared to other pitchers' sliders, has exceptional depth, has primarily 12-6 movement and results in somewhat more flyballs compared to other pitchers' sliders. Their change dives down out of the zone, generates more whiffs/swing compared to other pitchers' changeups, is much firmer than usual, results in more flyballs compared to other pitchers' changeups and has slight armside fade.