Non-MLB
Although they have not thrown an MLB pitch in 2024, Elmer Dessens threw 1,584 pitches that were tracked by the PITCHf/x system between 2007 and 2010, all of them occuring in the MLB Regular Season. In 2010, they relied primarily on their Sinker (89mph), Slider (83mph) and Fourseam Fastball (89mph), also mixing in a Change (82mph). He also rarely threw a Curve (76mph).
In 2010, compared to other RHP:
Their sinker has surprisingly little armside run, has below average velo and results in somewhat more flyballs compared to other pitchers' sinkers. Their slider is basically never swung at and missed compared to other pitchers' sliders and has some two-plane movement. Their fourseam fastball is basically never swung at and missed compared to other pitchers' fourseamers, has below average velo, has less armside movement than typical, has some natural sinking action and results in somewhat more flyballs compared to other pitchers' fourseamers. Their change results in somewhat more flyballs compared to other pitchers' changeups. Their curve (take this with a grain of salt because they've only thrown 19 of them in 2010) is basically never swung at and missed compared to other pitchers' curves, results in many more groundballs compared to other pitchers' curves, has primarily 12-6 movement and has slightly below average velo.