Although they have not thrown an MLB pitch in 2023, Ryan Castellani threw 1,768 pitches that were tracked by the PITCHf/x system between 2017 and 2022, including pitches thrown in the MLB Regular Season and Spring Training. In 2022, they relied primarily on their Sinker (93mph) and Slider (86mph), also mixing in a Change (87mph) and Fourseam Fastball (94mph). He also rarely threw a Curve (80mph).
In 2022, compared to other RHP:
His sinker generates a high number of swings & misses compared to other pitchers' sinkers, has slightly above average velo and has some natural sinking action. His slider is a prototypical pitch with few remarkable qualities. His change is much firmer than usual, has slight armside fade and has some natural sink to it. His fourseam fastball generates an extremely high number of swings & misses compared to other pitchers' fourseamers, has heavy sinking action and has essentially average velo. His curve (take this with a grain of salt because he's only thrown 4 of them in 2022) is basically never swung at and missed compared to other pitchers' curves, results in more flyballs compared to other pitchers' curves and is slightly harder than usual.