Seattle Mariners
Although they have not thrown an MLB pitch in 2024, Jackson Kowar threw 2,507 pitches that were tracked by the PITCHf/x system between 2020 and 2023, including pitches thrown in the MLB Regular Season and Spring Training. In 2023, they relied primarily on their Fourseam Fastball (97mph), Change (87mph) and Slider (86mph).
In 2023, compared to other RHP:
Their fourseam fastball is blazing fast, generates more whiffs/swing compared to other pitchers' fourseamers, has some natural sinking action, results in somewhat more groundballs compared to other pitchers' fourseamers and has slight armside run. Their change is slightly firmer than usual, has slight armside fade and has some natural sink to it. Their slider has primarily 12-6 movement and has some two-plane movement.