Boston Red Sox
Greg Weissert has thrown 2,603 pitches that have been tracked by the PITCHf/x system between 2022 and 2025, including pitches thrown in the MLB Regular Season and Spring Training. In 2025, they have relied primarily on their Slider (84mph) and Fourseam Fastball (95mph), also mixing in a Sinker (94mph) and Change (87mph).
In 2025, compared to other RHP:
Their slider (take this with a grain of salt because they've only thrown 7 of them in 2025) generates an extremely high number of swings & misses compared to other pitchers' sliders, sweeps across the zone and is an extreme flyball pitch compared to other pitchers' sliders. Their fourseam fastball (take this with a grain of salt because they've only thrown 5 of them in 2025) generates an extremely high number of swings & misses compared to other pitchers' fourseamers, has heavy sinking action, is an extreme flyball pitch compared to other pitchers' fourseamers, has slight armside run and has slightly above average velo. Their sinker (take this with a grain of salt because they've only thrown 3 of them in 2025) has heavy sinking action, is basically never swung at and missed compared to other pitchers' sinkers, has an obvious tail, is an extreme flyball pitch compared to other pitchers' sinkers and has slightly above average velo. Their change (take this with a grain of salt because they've only thrown 1 of them in 2025) generates an extremely high number of swings & misses compared to other pitchers' changeups, has an obvious armside fade, dives down out of the zone, is much firmer than usual and results in more flyballs compared to other pitchers' changeups.