Chicago Cubs
Ryan Zeferjahn has thrown 3,390 pitches that have been tracked by the PITCHf/x system between 2022 and 2026, including pitches thrown in the MLB Regular Season, Spring Training and Fall/Winter Ball. In 2026, they have relied primarily on their Slider (86mph) and Fourseam Fastball (97mph), also mixing in a Sinker (96mph). He also rarely throws a Curve (85mph).
In 2026, compared to other RHP:
Their slider sweeps across the zone and results in more flyballs compared to other pitchers' sliders. Their fourseam fastball generates an extremely high number of swings & misses compared to other pitchers' fourseamers, is blazing fast, has much less armside movement than typical and has some natural sinking action. Their sinker is a real worm killer that generates an extreme number of groundballs compared to other pitchers' sinkers, is blazing fast and has some natural sinking action. Their curve is thrown extremely hard, generates a high number of swings & misses compared to other pitchers' curves and results in more flyballs compared to other pitchers' curves.