Non-MLB
Although they have not thrown an MLB pitch in 2024, Jhon Romero threw 1,090 pitches that were tracked by the PITCHf/x system between 2021 and 2023, including pitches thrown in the MLB Regular Season, The World Baseball Classic and Spring Training. In 2023, they relied primarily on their Fourseam Fastball (94mph) and Change (85mph), also mixing in a Slider (85mph).
In 2023, compared to other RHP:
Their fourseam fastball has slightly above average velo and has slightly less natural movement than typical. Their change generates an extremely high number of swings & misses compared to other pitchers' changeups, has slight cut action, results in somewhat more groundballs compared to other pitchers' changeups and has some natural sink to it. Their slider has some two-plane movement.