St. Louis Cardinals
Although they have not thrown an MLB pitch in 2023, Ryan Helsley threw 2,837 pitches that were tracked by the PITCHf/x system between 2019 and 2022, including pitches thrown in the MLB Regular Season and Spring Training. In 2022, they relied primarily on their Fourseam Fastball (100mph) and Slider (89mph), also mixing in a Curve (81mph). He also rarely threw a Change (89mph).
In 2022, compared to other RHP:
His fourseam fastball generates an extremely high number of swings & misses compared to other pitchers' fourseamers, is thrown at a speed that's borderline unfair and has much less armside movement than typical. His slider is thrown extremely hard, generates an extremely high number of swings & misses compared to other pitchers' sliders and results in more flyballs compared to other pitchers' sliders. His curve generates an extremely high number of swings & misses compared to other pitchers' curves, results in more flyballs compared to other pitchers' curves, has a sharp downward bite, is slightly harder than usual and has primarily 12-6 movement. His change (take this with a grain of salt because he's only thrown 8 of them in 2022) is thrown extremely hard, results in more flyballs compared to other pitchers' changeups and has a lot of backspin.