Kansas City Royals
Although they have not thrown an MLB pitch in 2023, Brad Keller threw 10,564 pitches that were tracked by the PITCHf/x system between 2018 and 2022, including pitches thrown in the MLB Regular Season and Spring Training. In 2022, they relied primarily on their Slider (87mph), Fourseam Fastball (95mph) and Sinker (93mph). He also rarely threw a Change (90mph) and Splitter (90mph).
In 2022, compared to other RHP:
His slider has exceptional depth, is much harder than usual and results in somewhat more flyballs compared to other pitchers' sliders. His fourseam fastball is straight as an arrow, generates a very high amount of groundballs compared to other pitchers' fourseamers, has some natural sinking action and has slightly above average velo. His sinker generates a very high amount of groundballs compared to other pitchers' sinkers, has surprisingly little armside run, has slightly above average velo and has some natural sinking action. His change is thrown extremely hard. His splitter is thrown extremely hard, is basically never swung at and missed compared to other pitchers' splitters and results in many more groundballs compared to other pitchers' splitters.