Seattle Mariners
Although they have not thrown an MLB pitch in 2024, Zach Muckenhirn threw 1,312 pitches that were tracked by the PITCHf/x system between 2022 and 2023, including pitches thrown in the MLB Regular Season, The World Baseball Classic and Spring Training. In 2023, they relied primarily on their Fourseam Fastball (92mph) and Change (85mph), also mixing in a Slider (84mph). He also rarely threw a Curve (75mph).
In 2023, compared to other LHP:
Their fourseam fastball has much less armside movement than typical and has essentially average velo. Their change results in many more groundballs compared to other pitchers' changeups, has slight cut action, is slightly firmer than usual and has some natural sink to it. Their slider is basically never swung at and missed compared to other pitchers' sliders, results in somewhat more groundballs compared to other pitchers' sliders and has some two-plane movement. Their curve (take this with a grain of salt because they've only thrown 5 of them in 2023) has an exceptional bite, is basically never swung at and missed compared to other pitchers' curves and is an extreme flyball pitch compared to other pitchers' curves.