Oakland Athletics
Although they have not thrown an MLB pitch in 2024, Dean Kiekhefer threw 392 pitches that were tracked by the PITCHf/x system between 2016 and 2018, all of them occuring in the MLB Regular Season. In 2018, they relied primarily on their Fourseam Fastball (87mph) and Slider (76mph). He also rarely threw a Change (83mph).
In 2018, compared to other LHP:
Their fourseam fastball comes in below hitting speed, has heavy sinking action, is a real worm killer that generates an extreme number of groundballs compared to other pitchers' fourseamers, is basically never swung at and missed compared to other pitchers' fourseamers and has an obvious tail. Their slider (take this with a grain of salt because they've only thrown 19 of them in 2018) comes in below hitting speed, results in more flyballs compared to other pitchers' sliders, has short glove-side cut and has some two-plane movement. Their change (take this with a grain of salt because they've only thrown 2 of them in 2018) is basically never swung at and missed compared to other pitchers' changeups, dives down out of the zone and is an extreme flyball pitch compared to other pitchers' changeups.