Seattle Mariners
Although they have not thrown an MLB pitch in 2024, David Rollins threw 694 pitches that were tracked by the PITCHf/x system between 2015 and 2017, including pitches thrown in the MLB Regular Season and Spring Training. In 2017, they relied primarily on their Fourseam Fastball (90mph) and Change (85mph), also mixing in a Slider (80mph) and Cutter (85mph).
In 2017, compared to other LHP:
Their fourseam fastball is an extreme flyball pitch compared to other pitchers' fourseamers, has less armside movement than typical and has essentially average velo. Their change (take this with a grain of salt because they've only thrown 13 of them in 2017) generates an extremely high number of swings & misses compared to other pitchers' changeups, results in more flyballs compared to other pitchers' changeups, has slight cut action and is slightly firmer than usual. Their slider (take this with a grain of salt because they've only thrown 6 of them in 2017) is basically never swung at and missed compared to other pitchers' sliders, results in more flyballs compared to other pitchers' sliders, has primarily 12-6 movement and has some two-plane movement. Their cutter (take this with a grain of salt because they've only thrown 3 of them in 2017) generates an extremely high number of swings & misses compared to other pitchers' cutters, is an extreme flyball pitch compared to other pitchers' cutters, has some natural sink and has strong cutting action.