Non-MLB
Although they have not thrown an MLB pitch in 2024, Logan Ondrusek threw 4,578 pitches that were tracked by the PITCHf/x system between 2010 and 2016, including pitches thrown in the MLB Regular Season and Spring Training. In 2016, they relied primarily on their Fourseam Fastball (94mph) and Cutter (90mph), also mixing in a Sinker (93mph), Splitter (81mph) and Curve (76mph).
In 2016, compared to other RHP:
Their fourseam fastball is a real worm killer that generates an extreme number of groundballs compared to other pitchers' fourseamers, has less armside movement than typical, has some natural sinking action and has essentially average velo. Their cutter generates a high number of swings & misses compared to other pitchers' cutters, generates a very high amount of groundballs compared to other pitchers' cutters, has slightly above average velo and has strong cutting action. Their sinker has less armside run than typical and results in somewhat more groundballs compared to other pitchers' sinkers. Their splitter (take this with a grain of salt because they've only thrown 12 of them in 2016) has surprising cut action, is an extreme flyball pitch compared to other pitchers' splitters, has some natural sink to it and has below average velo. Their curve (take this with a grain of salt because they've only thrown 11 of them in 2016) is basically never swung at and missed compared to other pitchers' curves, results in more flyballs compared to other pitchers' curves, has a sharp downward bite and has slightly below average velo.