Miguel Castro has thrown 3,500 pitches that have been tracked by the PITCHf/x system between 2015 and 2019, including pitches thrown in the MLB Regular Season and Spring Training. In 2019, he has relied primarily on his Fourseam Fastball (97mph) and Slider (86mph), also mixing in a Change (90mph).
Basic description of 2019 pitches compared to other RHP:
His fourseam fastball has heavy sinking action, has an obvious tail, is blazing fast and results in many more groundballs compared to other pitchers' fourseamers. His slider has some two-plane movement. His change (take this with a grain of salt because he's only thrown 7 of them in 2019) is thrown extremely hard, generates an extremely high number of swings & misses compared to other pitchers' changeups, has an obvious armside fade, dives down out of the zone and results in more flyballs compared to other pitchers' changeups.