Although they have not thrown an MLB pitch in 2023, Jorge Alcala threw 1,456 pitches that were tracked by the PITCHf/x system between 2019 and 2022, including pitches thrown in the MLB Regular Season and Spring Training. In 2022, they relied primarily on their Slider (87mph) and Fourseam Fastball (95mph), also mixing in a Sinker (94mph) and Change (88mph).
In 2022, compared to other RHP:
His slider is much harder than usual and has primarily 12-6 movement. His fourseam fastball results in somewhat more flyballs compared to other pitchers' fourseamers, has slight armside run and has slightly above average velo. His sinker is basically never swung at and missed compared to other pitchers' sinkers and has well above average velo. His change (take this with a grain of salt because he's only thrown 10 of them in 2022) generates an extremely high number of swings & misses compared to other pitchers' changeups, has an obvious armside fade, is much firmer than usual and results in more flyballs compared to other pitchers' changeups.