Non-MLB
Although they have not thrown an MLB pitch in 2024, Alex Burnett threw 2,848 pitches that were tracked by the PITCHf/x system between 2010 and 2013, all of them occuring in the MLB Regular Season. In 2013, they relied primarily on their Sinker (91mph), also mixing in a Slider (84mph), Fourseam Fastball (92mph) and Change (84mph). He also rarely threw a Curve (76mph).
In 2013, compared to other RHP:
Their sinker is basically never swung at and missed compared to other pitchers' sinkers and results in somewhat more flyballs compared to other pitchers' sinkers. Their slider (take this with a grain of salt because they've only thrown 10 of them in 2013) is basically never swung at and missed compared to other pitchers' sliders, is an extreme flyball pitch compared to other pitchers' sliders, has less than expected depth and has primarily 12-6 movement. Their fourseam fastball (take this with a grain of salt because they've only thrown 9 of them in 2013) has essentially average velo and has slightly less natural movement than typical. Their change (take this with a grain of salt because they've only thrown 4 of them in 2013) generates an extremely high number of swings & misses compared to other pitchers' changeups and results in more flyballs compared to other pitchers' changeups. Their curve (take this with a grain of salt because they've only thrown 2 of them in 2013) 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, has slight glove-side movement and has slightly below average velo.