Pittsburgh Pirates
Mason Montgomery has thrown 3,243 pitches that have been tracked by the PITCHf/x system between 2023 and 2026, including pitches thrown in the MLB Regular Season, The World Baseball Classic and Spring Training. In 2026, they have relied primarily on their Fourseam Fastball (98mph) and Slider (89mph), also mixing in a Curve (86mph). He also rarely throws a Change (91mph).
In 2026, 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 much less armside movement than typical. Their slider is thrown extremely hard, results in more flyballs compared to other pitchers' sliders and has some two-plane movement. Their curve (take this with a grain of salt because they've only thrown 6 of them in 2026) is thrown extremely hard, is basically never swung at and missed compared to other pitchers' curves, is an extreme flyball pitch compared to other pitchers' curves and has primarily 12-6 movement. Their change (take this with a grain of salt because they've only thrown 1 of them in 2026) is thrown extremely hard, is basically never swung at and missed compared to other pitchers' changeups, has surprising cut action and is an extreme flyball pitch compared to other pitchers' changeups.