Sean Sullivan (No. 21 PuRP) had an up-and-down season. He made his MLB debut on June 12th in the Las Vegas heat (while battling illness) and shined. But that was about the high point for Sullivan, as he bounced between…
Colorado Rockies left-hander Sean Sullivan reflected on his 2026 MLB campaign and outlined his goals while pitching in the Arizona Fall League. Sullivan made his major league debut on June 12 but faced an inconsistent season marked by an elbow injury in August. He is currently playing for the Salt River Rafters to log extra innings and refine his pitching mechanics.
Working alongside Owen Cuffe, Sullivan is developing a traditional gyro slider and testing new changeup grips to complement his cutter and sweeper. Colorado's senior director of player development, Chris Forbes, noted that the fall stint focuses on regaining lost innings, building physical strength, and preparing Sullivan for a healthy 2027 season.
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