Non-MLB
Although they have not thrown an MLB pitch in 2024, Adam Loewen threw 959 pitches that were tracked by the PITCHf/x system between 2008 and 2023, including pitches thrown in the MLB Regular Season, The World Baseball Classic and Spring Training. In 2023, they relied primarily on their Sinker (85mph) and Fourseam Fastball (85mph), also mixing in a Slider (79mph).
In 2023, compared to other LHP:
Their sinker (take this with a grain of salt because they've only thrown 12 of them in 2023) is so slow that it is substantially gravitational, generates an extremely high number of swings & misses compared to other pitchers' sinkers, has heavy sinking action, is an extreme flyball pitch compared to other pitchers' sinkers and has surprisingly little armside run. Their fourseam fastball (take this with a grain of salt because they've only thrown 7 of them in 2023) comes in below hitting speed, has heavy sinking action, is an extreme flyball pitch compared to other pitchers' fourseamers and has much less armside movement than typical. Their slider (take this with a grain of salt because they've only thrown 4 of them in 2023) is basically never swung at and missed compared to other pitchers' sliders, has exceptional depth, results in more flyballs compared to other pitchers' sliders, has short glove-side cut and has below average velo.