Non-MLB
Although they have not thrown an MLB pitch in 2024, Brian Flynn threw 3,089 pitches that were tracked by the PITCHf/x system between 2013 and 2019, including pitches thrown in the MLB Regular Season and Spring Training. In 2019, they relied primarily on their Slider (83mph), Sinker (91mph) and Fourseam Fastball (91mph). He also rarely threw a Change (82mph) and Curve (73mph).
In 2019, compared to other LHP:
Their slider has some two-plane movement. Their sinker has less armside run than typical and has some natural sinking action. Their fourseam fastball generates fewer whiffs/swing compared to other pitchers' fourseamers, has some natural sinking action, 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 9 of them in 2019) generates an extremely high number of swings & misses compared to other pitchers' changeups, has surprising cut action and is an extreme flyball pitch compared to other pitchers' changeups. Their curve (take this with a grain of salt because they've only thrown 1 of them in 2019) is basically never swung at and missed compared to other pitchers' curves, has sweeping glove-side movement, is an extreme flyball pitch compared to other pitchers' curves, has a sharp downward bite and has slightly below average velo.