Oakland Athletics
Although they have not thrown an MLB pitch in 2024, Garrett Olson threw 4,580 pitches that were tracked by the PITCHf/x system between 2007 and 2013, including pitches thrown in the MLB Regular Season and Spring Training. In 2013, they relied primarily on their Fourseam Fastball (90mph) and Slider (82mph), also mixing in a Change (83mph).
In 2013, compared to other LHP:
Their fourseam fastball (take this with a grain of salt because they've only thrown 18 of them in 2013) is an extreme flyball pitch compared to other pitchers' fourseamers, generates more whiffs/swing compared to other pitchers' fourseamers, has some natural sinking action and has essentially average velo. Their slider (take this with a grain of salt because they've only thrown 6 of them in 2013) sweeps across the zone, has exceptional depth and results in more flyballs compared to other pitchers' sliders. Their change (take this with a grain of salt because they've only thrown 2 of them in 2013) generates an extremely high number of swings & misses compared to other pitchers' changeups, is an extreme flyball pitch compared to other pitchers' changeups and has a lot of backspin.