Seattle Mariners
George Kirby has thrown 8,141 pitches that have been tracked by the PITCHf/x system between 2022 and 2024, including pitches thrown in the MLB Regular Season and Spring Training. In 2024, they have relied primarily on their Fourseam Fastball (96mph), Slider (87mph) and Sinker (96mph), also mixing in a Splitter (86mph) and Curve (83mph). He also rarely throws a Cutter (93mph) and Knuckleball (74mph).
In 2024, compared to other RHP:
Their fourseam fastball generates an extremely high number of swings & misses compared to other pitchers' fourseamers, has some natural sinking action, has well above average velo and results in somewhat more flyballs compared to other pitchers' fourseamers. Their slider has exceptional depth, has short glove-side cut and is much harder than usual. Their sinker is blazing fast and has slight armside run. Their splitter has some natural sink to it, is slightly firmer than usual and results in somewhat more flyballs compared to other pitchers' splitters. Their curve is thrown extremely hard, has an exceptional bite and results in many more groundballs compared to other pitchers' curves. Their cutter (take this with a grain of salt because they've only thrown 11 of them in 2024) is basically never swung at and missed compared to other pitchers' cutters, is blazing fast, is an extreme flyball pitch compared to other pitchers' cutters and has some natural sink. Their knuckleball (take this with a grain of salt because they've only thrown 1 of them in 2024) flutters and floats unpredictably toward the plate.