| Player: Sean Sullivan | |||||||||||
| Org: Colorado Rockies | Highest Level: Double A | Position(s): LHP | |||||||||
| Height: 6’4″ | Weight: 190 lbs. | Bats: Right | Throws: Left | ||||||||
| Summary: Sullivan succeeds in a way that doesn’t look conventional but continues to work. The low-slot, cross-body delivery creates extreme angle and deception, allowing an upper-80s fastball to play well above its radar reading. He’s typically works around 89–91, and the pitch plays through carry traits, extension and precise top-of-zone location. The delivery features a big leg kick, heavy crossfire and a sidearm release that gives hitters an uncomfortable look, and he repeats it well enough to fill the zone at a high clip. The changeup is the separator and often functions as the primary weapon. It comes out of the same slot with convincing arm speed and consistently disrupts timing, giving him a reliable swing-and-miss option against both sides. A slider/sweeper variant rounds out the mix and flashes usable depth, though it’s less consistent than the change. The entire profile is built on command, pitch blending and deception rather than raw velocity, and while the margin for error is thinner in a challenging home environment, the strike-throwing and feel give him a legitimate back-end starter path with bulk-relief fallback if durability or stuff dictate a role shift. | |||||||||||
Shaun Kernahan is the founder and lead writer of Three Quarter Slot, where he blends scouting precision with a storyteller’s eye for the human side of the game. Based in Parker, Colorado, he has covered baseball prospects at every level since 2013, delivering in-depth evaluations, draft analysis, and developmental insight. Over the years, he has built Three Quarter Slot into a trusted home for thoughtful prospect coverage, detailed scouting reports, and a grounded look at how talent evolves
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