Pittsburgh Pirates
Although they have not thrown an MLB pitch in 2026, Mason Montgomery threw 3,140 pitches that were tracked by the PITCHf/x system between 2023 and 2025, including pitches thrown in the MLB Regular Season and Spring Training. In 2025, they relied primarily on their Fourseam Fastball (99mph) and Slider (90mph).
In 2025, compared to other LHP:
Their 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 less armside movement than typical. Their slider is thrown extremely hard, generates more whiffs/swing compared to other pitchers' sliders, has primarily 12-6 movement and has some two-plane movement.