Trevor Kelley

Seattle Mariners

Pitch Repertoire At-A-Glance

Trevor Kelley has thrown 2,186 pitches that have been tracked by the PITCHf/x system between 2019 and 2024, including pitches thrown in the MLB Regular Season and Spring Training. In 2024, they have relied primarily on their Slider (75mph) and Fourseam Fastball (88mph). He also rarely throws a Cutter (82mph) and Change (80mph).


In 2024, compared to other RHP:
Their slider comes in below hitting speed, sweeps across the zone and results in somewhat more flyballs compared to other pitchers' sliders. Their fourseam fastball comes in below hitting speed, generates an extremely high number of swings & misses compared to other pitchers' fourseamers, has heavy sinking action and has an obvious tail. Their cutter (take this with a grain of salt because they've only thrown 11 of them in 2024) comes in below hitting speed, has heavy sink, is an extreme flyball pitch compared to other pitchers' cutters and has strong cutting action. Their change (take this with a grain of salt because they've only thrown 7 of them in 2024) is basically never swung at and missed compared to other pitchers' changeups, has an obvious armside fade, dives down out of the zone, has below average velo and results in more flyballs compared to other pitchers' changeups.