Non-MLB
Although they have not thrown an MLB pitch in 2024, Williams Pérez threw 2,691 pitches that were tracked by the PITCHf/x system between 2015 and 2016, all of them occuring in the MLB Regular Season. In 2016, they relied primarily on their Sinker (92mph), also mixing in a Curve (77mph), Change (80mph) and Fourseam Fastball (93mph).
In 2016, compared to other RHP:
Their sinker has slight armside run and has some natural sinking action. Their curve results in somewhat more groundballs compared to other pitchers' curves. Their change dives down out of the zone, has below average velo and results in somewhat more flyballs compared to other pitchers' changeups. Their fourseam fastball has heavy sinking action, has an obvious tail, has essentially average velo and results in somewhat more groundballs compared to other pitchers' fourseamers.