Washington Nationals
Mason Thompson has thrown 1,995 pitches that have been tracked by the PITCHf/x system between 2021 and 2025, including pitches thrown in the MLB Regular Season and Spring Training. In 2025, they have relied primarily on their Fourseam Fastball (95mph), Sinker (94mph) and Slider (85mph), also mixing in a Change (87mph) and Curve (82mph).
In 2025, compared to other RHP:
Their fourseam fastball generates more whiffs/swing compared to other pitchers' fourseamers, results in somewhat more groundballs compared to other pitchers' fourseamers and has slightly above average velo. Their sinker results in more flyballs compared to other pitchers' sinkers, has well above average velo and has slight armside run. Their slider has exceptional depth and is an extreme flyball pitch compared to other pitchers' sliders. Their change generates an extremely high number of swings & misses compared to other pitchers' changeups, is slightly firmer than usual, has slight armside fade and has some natural sink to it. Their curve (take this with a grain of salt because they've only thrown 13 of them in 2025) generates an extremely high number of swings & misses compared to other pitchers' curves, is much harder than usual, results in more flyballs compared to other pitchers' curves and has a sharp downward bite.