Kansas City Royals
Stephen Kolek has thrown 4,635 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, Spring Training and Fall/Winter Ball. In 2026, they have relied primarily on their Fourseam Fastball (95mph), Sinker (95mph) and Slider (84mph), also mixing in a Change (90mph) and Cutter (91mph).
In 2026, compared to other RHP:
Their fourseam fastball (take this with a grain of salt because they've only thrown 11 of them in 2026) has heavy sinking action, is basically never swung at and missed compared to other pitchers' fourseamers, is an extreme flyball pitch compared to other pitchers' fourseamers and has well above average velo. Their sinker (take this with a grain of salt because they've only thrown 8 of them in 2026) has heavy sinking action, is basically never swung at and missed compared to other pitchers' sinkers, is an extreme flyball pitch compared to other pitchers' sinkers, has well above average velo and has slight armside run. Their slider (take this with a grain of salt because they've only thrown 8 of them in 2026) is basically never swung at and missed compared to other pitchers' sliders, sweeps across the zone, has exceptional depth and results in more flyballs compared to other pitchers' sliders. Their change (take this with a grain of salt because they've only thrown 7 of them in 2026) is thrown extremely hard, is basically never swung at and missed compared to other pitchers' changeups, dives down out of the zone, results in more flyballs compared to other pitchers' changeups and has slight armside fade. Their cutter (take this with a grain of salt because they've only thrown 2 of them in 2026) is basically never swung at and missed compared to other pitchers' cutters, is an extreme flyball pitch compared to other pitchers' cutters, has well above average velo and has some natural sink.