Colorado Rockies
Although they have not thrown an MLB pitch in 2024, Keith Hessler threw 619 pitches that were tracked by the PITCHf/x system between 2015 and 2016, all of them occuring in the MLB Regular Season. In 2016, they relied primarily on their Fourseam Fastball (93mph) and Slider (84mph). He also rarely threw a Change (88mph).
In 2016, compared to other LHP:
Their fourseam fastball has less armside movement than typical, has some natural sinking action and has slightly above average velo. Their slider results in somewhat more groundballs compared to other pitchers' sliders and has some two-plane movement. Their change (take this with a grain of salt because they've only thrown 1 of them in 2016) is thrown extremely hard, is basically never swung at and missed compared to other pitchers' changeups, has surprising cut action, is an extreme flyball pitch compared to other pitchers' changeups and has an extreme amount of backspin.