Seattle Mariners
Although they have not thrown an MLB pitch in 2024, Gregory Santos threw 1,724 pitches that were tracked by the PITCHf/x system between 2021 and 2023, including pitches thrown in the MLB Regular Season, Spring Training and Fall/Winter Ball. In 2023, they relied primarily on their Slider (92mph) and Sinker (99mph), also mixing in a Fourseam Fastball (99mph).
In 2023, compared to other RHP:
Their slider is thrown extremely hard, results in somewhat more groundballs compared to other pitchers' sliders and has some two-plane movement. Their sinker generates an extremely high number of swings & misses compared to other pitchers' sinkers, is thrown at a speed that's borderline unfair, generates a very high amount of groundballs compared to other pitchers' sinkers, has less armside run than typical and has some natural sinking action. Their fourseam fastball has heavy sinking action, is thrown at a speed that's borderline unfair and results in somewhat more groundballs compared to other pitchers' fourseamers.