Seattle Mariners
Trevor Kelley has thrown 2,397 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 Fourseam Fastball (88mph) and Slider (75mph). He also rarely throws a Cutter (82mph), Sinker (88mph) and Change (80mph).
In 2024, compared to other RHP:
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, has an obvious tail and results in somewhat more groundballs compared to other pitchers' fourseamers. Their slider comes in below hitting speed, sweeps across the zone and results in somewhat more flyballs compared to other pitchers' sliders. Their cutter (take this with a grain of salt because they've only thrown 14 of them in 2024) comes in below hitting speed, has heavy sink, is an extreme flyball pitch compared to other pitchers' cutters and generates more whiffs/swing compared to other pitchers' cutters. Their sinker (take this with a grain of salt because they've only thrown 13 of them in 2024) is so slow that it is substantially gravitational, generates an extremely high number of swings & misses compared to other pitchers' sinkers, has heavy sinking action, has an obvious tail and is an extreme flyball pitch compared to other pitchers' sinkers. Their change (take this with a grain of salt because they've only thrown 11 of them in 2024) has an obvious armside fade, dives down out of the zone, has below average velo, generates fewer whiffs/swing compared to other pitchers' changeups and results in more flyballs compared to other pitchers' changeups.