Sullivan was removed from his start Friday against the Athletics due to an illness, Patrick Saunders of The Denver Post reports.
Sullivan gave up two hits and zero walks while striking out two batters in three shutout innings, but his MLB debut ended prematurely once he began to feel under the weather. Despite his brief outing, the 23-year-old southpaw may have pitched well enough in an extremely hitter-friendly environment to earn another start with the big club.
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Rockies' Sean Sullivan: Contract selected
Rotowire
The Rockies selected Sullivan's contract from Triple-A Albuquerque ahead of his start Friday against the Athletics.
Sullivan will be making his MLB debut Friday, though he will be doing so in a very hitter-friendly environment at Las Vegas Ballpark after posting a 5.76 ERA and 1.57 WHIP in 54.2 innings at Triple-A, making him a less-than-desirable fantasy option. Sammy Peralta was optioned to Albuquerque to make room for Sullivan on the active roster, and Chase Dollander (elbow) was moved to the 60-day IL to free up a 40-man spot.
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Rockies' Sean Sullivan: Set to make MLB debut Friday
Rotowire
The Rockies will call up Sullivan from Triple-A Albuquerque to make his major-league debut with a start Friday versus the Athletics, Kevin Henry of The Denver Gazette reports.
It's a difficult environment for Sullivan to be making his big-league debut, as Friday's contest will be played at the very hitter-friendly Las Vegas Ballpark. The 23-year-old southpaw holds a 5.60 ERA and 50:19 K:BB over 54.2 innings covering 11 starts this season with Albuquerque. Sullivan could earn additional starts if he pitches well, but he's not a recommended fantasy option Friday.
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Rockies' Sean Sullivan: Ready to go for Double-A club
Rotowire
Double-A Hartford activated Sullivan (hip) on Tuesday, and he's listed as the team's scheduled starter for Game 1 of a doubleheader Wednesday with Binghamton.
Sullivan is ready to make his 2025 debut for the Double-A club after he was delayed to begin the season while completing his recovery from hip surgery. He was cleared to join Hartford after making two rehab starts between the rookie-level Arizona Complex League and Single-A Fresno. He built up to four innings in his most recent outing last Thursday in the California League, striking out two while allowing no runs on three hits and no walks.
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Rockies' Sean Sullivan: Rebounding from hip surgery
Rotowire
Manager Bud Black said Thursday that Sullivan will be behind the Rockies' other pitchers to begin spring training while the left-hander continues to recover from hip surgery, Patrick Lyons of JustBaseball.com reports.
It's unclear when Sullivan had surgery, but it was presumably at some point over the winter, as he finished last season on Double-A Hartford's active roster. Sullivan was excellent over his seven starts with Hartford (1.97 ERA, 1.09 WHIP, 24:7 K:BB in 32 innings), and his efforts earned him his first invitation to big-league camp as a non-roster invitee. Once he's fully ramped up, Sullivan will likely open the 2025 season with either Hartford or Triple-A Albuquerque.
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Rockies' Sean Sullivan: Debuts at Double-A
Rotowire
The Rockies promoted Sullivan from High-A Spokane to Double-A Hartford on Saturday.
Sullivan made his Double-A debut later that day, working four scoreless innings and striking out two while allowing three hits and one walk. The left-hander was bumped up to Double-A after turning in two straight five-inning, 10-strikeout performances to end his time at High-A. Sullivan forged a 2.16 ERA, 0.84 WHIP and 101:8 K:BB in 83.1 innings with Spokane.
