Boston Red Sox
Eduardo Rivera has thrown 225 pitches that have been tracked by the PITCHf/x system between 2024 and 2026, including pitches thrown in the MLB Regular Season, The World Baseball Classic, Spring Training and Fall/Winter Ball. In 2026, they have relied primarily on their Fourseam Fastball (95mph), also mixing in a Slider (86mph) and Change (88mph).
In 2026, compared to other LHP:
Their fourseam fastball generates an extremely high number of swings & misses compared to other pitchers' fourseamers, is straight as an arrow, is blazing fast and results in somewhat more flyballs compared to other pitchers' fourseamers. Their slider generates an extremely high number of swings & misses compared to other pitchers' sliders, results in more flyballs compared to other pitchers' sliders, is much harder than usual and has some two-plane movement. Their change is thrown extremely hard, generates an extremely high number of swings & misses compared to other pitchers' changeups, is an extreme flyball pitch compared to other pitchers' changeups, has slight cut action and has some natural sink to it.