Seattle Mariners
George Kirby has thrown 13,697 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 Slider (87mph), Fourseam Fastball (97mph) and Sinker (97mph), also mixing in a Curve (84mph) and Change (89mph). He also rarely throws a Cutter (93mph) and Splitter (87mph).
In 2026, compared to other RHP:
Their slider sweeps across the zone, has exceptional depth and is much harder than usual. Their fourseam fastball is blazing fast, generates more whiffs/swing compared to other pitchers' fourseamers and has some natural sinking action. Their sinker is thrown at a speed that's borderline unfair, results in somewhat more groundballs compared to other pitchers' sinkers, has slight armside run and has some natural sinking action. Their curve is thrown extremely hard, has an exceptional bite and is a real worm killer that generates an extreme number of groundballs compared to other pitchers' curves. Their change is thrown extremely hard, results in somewhat more flyballs compared to other pitchers' changeups, has slight armside fade and has some natural sink to it. Their cutter is blazing fast, generates a high number of swings & misses compared to other pitchers' cutters, has little cutting action, results in somewhat more flyballs compared to other pitchers' cutters and has some natural sink. Their splitter has dives down out of the zone, generates fewer whiffs/swing compared to other pitchers' splitters and is much firmer than usual.