Texas Rangers
Although they have not thrown an MLB pitch in 2024, Jack Leathersich threw 330 pitches that were tracked by the PITCHf/x system between 2015 and 2017, all of them occuring in the MLB Regular Season. In 2017, they relied primarily on their Fourseam Fastball (92mph), also mixing in a Change (83mph) and Curve (75mph).
In 2017, compared to other LHP:
Their fourseam fastball generates an extremely high number of swings & misses compared to other pitchers' fourseamers, is an extreme flyball pitch compared to other pitchers' fourseamers and has essentially average velo. Their change (take this with a grain of salt because they've only thrown 11 of them in 2017) is basically never swung at and missed compared to other pitchers' changeups, is an extreme flyball pitch compared to other pitchers' changeups, has slight cut action and has a lot of backspin. Their curve (take this with a grain of salt because they've only thrown 7 of them in 2017) has an exceptional bite, generates an extremely high number of swings & misses compared to other pitchers' curves, is an extreme flyball pitch compared to other pitchers' curves and has slight glove-side movement.