Colorado Rockies
Jack O'Loughlin has thrown 4,099 pitches that have been tracked by the PITCHf/x system between 2021 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 (84mph), also mixing in a Curve (75mph). He also rarely throws a Change (84mph) and Splitter (85mph).
In 2025, compared to other LHP:
Their fourseam fastball is basically never swung at and missed compared to other pitchers' fourseamers, has some natural sinking action, has essentially average velo and has slightly less natural movement than typical. Their slider is a real worm killer that generates an extreme number of groundballs compared to other pitchers' sliders and has some two-plane movement. Their curve has an exceptional bite, has slight glove-side movement and has slightly below average velo. Their change (take this with a grain of salt because they've only thrown 8 of them in 2025) generates an extremely high number of swings & misses compared to other pitchers' changeups, has surprising cut action, is an extreme flyball pitch compared to other pitchers' changeups, is slightly firmer than usual and has some natural sink to it. Their splitter (take this with a grain of salt because they've only thrown 4 of them in 2025) is basically never swung at and missed compared to other pitchers' splitters, has surprising cut action, is an extreme flyball pitch compared to other pitchers' splitters, has some natural sink to it and is slightly firmer than usual.