Seattle Mariners
Although they have not thrown an MLB pitch in 2026, Blas Castaño threw 4,170 pitches that were tracked by the PITCHf/x system between 2021 and 2025, including pitches thrown in the MLB Regular Season, Spring Training and Fall/Winter Ball. In 2025, they relied primarily on their Sinker (93mph), Slider (82mph) and Cutter (89mph), also mixing in a Change (88mph). He also rarely threw a Fourseam Fastball (94mph).
In 2025, compared to other RHP:
Their sinker has heavy sinking action, has slight armside run and has slightly above average velo. Their slider sweeps across the zone and results in more flyballs compared to other pitchers' sliders. Their cutter generates fewer whiffs/swing compared to other pitchers' cutters, results in more flyballs compared to other pitchers' cutters and has some natural sink. Their change is a real worm killer that generates an extreme number of groundballs compared to other pitchers' changeups, dives down out of the zone, generates fewer whiffs/swing compared to other pitchers' changeups, is much firmer than usual and has slight armside fade. Their fourseam fastball is an extreme flyball pitch compared to other pitchers' fourseamers, generates fewer whiffs/swing compared to other pitchers' fourseamers, has some natural sinking action, has essentially average velo and has slight armside run.