Seattle Mariners
George Kirby has thrown 11,403 pitches that have been tracked by the PITCHf/x system between 2022 and 2026, including pitches thrown in the MLB Regular Season and Spring Training. In 2026, they have relied primarily on their Fourseam Fastball (97mph) and Slider (87mph), also mixing in a Sinker (97mph), Curve (84mph) and Change (89mph). He also rarely throws a Cutter (93mph) and Splitter (85mph).
In 2026, compared to other RHP:
Their fourseam fastball has heavy sinking action, generates a high number of swings & misses compared to other pitchers' fourseamers and is blazing fast. Their slider sweeps across the zone, has exceptional depth, is much harder than usual and results in somewhat more flyballs compared to other pitchers' sliders. Their sinker is a real worm killer that generates an extreme number of groundballs compared to other pitchers' sinkers, is thrown at a speed that's borderline unfair, has slight armside run and has some natural sinking action. Their curve is thrown extremely hard, has an exceptional bite, is basically never swung at and missed compared to other pitchers' curves and results in more flyballs compared to other pitchers' curves. Their change is thrown extremely hard, has slight armside fade and has some natural sink to it. Their cutter is blazing fast, is an extreme flyball pitch compared to other pitchers' cutters and has little cutting action. Their splitter (take this with a grain of salt because they've only thrown 3 of them in 2026) has dives down out of the zone, is basically never swung at and missed compared to other pitchers' splitters and is an extreme flyball pitch compared to other pitchers' splitters.