Non-MLB
Although they have not thrown an MLB pitch in 2024, Brandon Cumpton threw 1,598 pitches that were tracked by the PITCHf/x system between 2013 and 2018, all of them occuring in the MLB Regular Season. In 2018, they relied primarily on their Fourseam Fastball (92mph) and Slider (83mph), also mixing in a Change using a Circle Change grip (85mph).
In 2018, compared to other RHP:
Their fourseam fastball has heavy sinking action, has an obvious tail, is an extreme flyball pitch compared to other pitchers' fourseamers and has essentially average velo. Their slider (take this with a grain of salt because they've only thrown 11 of them in 2018) is basically never swung at and missed compared to other pitchers' sliders, has exceptional depth and is an extreme flyball pitch compared to other pitchers' sliders. Their change using a circle change grip (take this with a grain of salt because they've only thrown 8 of them in 2018) generates an extremely high number of swings & misses compared to other pitchers' changeups, results in more flyballs compared to other pitchers' changeups, is slightly firmer than usual and has slight armside fade.