Washington Nationals
Although they have not thrown an MLB pitch in 2024, Kaleb Fleck threw 38 pitches that were tracked by the PITCHf/x system between 2016 and 2017, all of them occuring in Spring Training. In 2017, they relied primarily on their Fourseam Fastball (95mph) and Slider (85mph), also mixing in a Change (87mph).
In 2017, compared to other RHP:
Their fourseam fastball (take this with a grain of salt because they've only thrown 18 of them in 2017) has slightly above average velo and has some added backspin. Their slider (take this with a grain of salt because they've only thrown 6 of them in 2017) is an extreme flyball pitch compared to other pitchers' sliders and has some two-plane movement. Their change (take this with a grain of salt because they've only thrown 2 of them in 2017) is basically never swung at and missed compared to other pitchers' changeups, has surprising cut action, is much firmer than usual, results in more flyballs compared to other pitchers' changeups and has some natural sink to it.