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    Sean O'Sullivan

    SeanO'Sullivan

    • Starting Pitcher
    • Birthdate
      1/9/1987
    • BAT/THR
      Right/Right
    • Birthplace
      San Diego, CA

    Career Stats

    • W-L
      13-23
    • ERA
      6.01
    • K
      158
    • WHIP
      1.58
    • Overview
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    MLB Quick Links

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    Career Pitching

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    Stats
    Career
    GPGSCGSHOIPHRERHRBBK
    715600323.239822621659115158
    Latest News
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    Racing Positions

      • Reds OF Byrd fractures wrist on HBP vs. Phillies
        • 2Y
        Marlon Byrd
        • Royals' Witt (knee) exits after making sliding play
          • 36m
          Royals' Witt (knee) exits after making sliding play
          • Buxton addresses trade speculation: 'I'm a Twin'
            • 1h
            Buxton addresses trade speculation: 'I'm a Twin'
            • Yankees' Chisholm exits after foul ball to groin
              • 1h
              • Jorge Castillo
              Yankees' Chisholm exits after foul ball to groin
              • Angels' Trout suffers hamstring injury, put on IL
                • 1h
                Angels' Trout suffers hamstring injury, put on IL
                • ALPB team forfeits Pride Night game over jerseys
                  • 1h
                  ALPB team forfeits Pride Night game over jerseys
                  • Pereira on injured list after crashing into fence
                    • 3h
                    Pereira on injured list after crashing into fence
                    • Time's Up! MLB nixes clock for Home Run Derby
                      • 4h
                      Time's Up! MLB nixes clock for Home Run Derby
                      • Phillies OF García set for season-ending surgery
                        • 5h
                        Phillies OF García set for season-ending surgery
                        • Fantasy baseball lineup advice for Friday: Will Sasaki, Imai bounce back?
                          • 6h
                          • ESPN Fantasy
                          Houston Astros starting pitcher Tatsuya throws during the first inning of a baseball game against the Kansas City Royals, Friday, June 12, 2026, in Kansas City, Mo.

                        MLB News

                        Royals' Bobby Witt Jr. exits game with right knee discomfort

                        Royals' Bobby Witt Jr. exits game with right knee discomfort

                        Kansas City shortstop Bobby Witt Jr. left the Royals' game with the Cardinals on Thursday night with right knee discomfort after making a sliding play in the field.
                        Byron Buxton addresses trade speculation: 'I'm a Twin'

                        Byron Buxton addresses trade speculation: 'I'm a Twin'

                        Amid speculation that he could be dealt ahead of the Aug. 3 trade deadline, Minnesota center fielder Byron Buxton reiterated Thursday, "I'm a Twin."
                        Yankees' Jazz Chisholm exits game after foul ball to groin

                        Yankees' Jazz Chisholm exits game after foul ball to groin

                        Yankees second baseman Jazz Chisholm Jr. exited Thursday's game against the White Sox after a foul ball ricocheted off the ground and into his groin area.
                        Angels' Mike Trout to injured list with right hamstring injury

                        Angels' Mike Trout to injured list with right hamstring injury

                        Angels center fielder Mike Trout, who is batting .234 with 17 home runs and 36 RBIs this season, has been placed on the injured list with a hamstring injury.
                        Bryan Woo throws 7 scoreless innings as the Mariners beat the Orioles 3-0

                        Bryan Woo throws 7 scoreless innings as the Mariners beat the Orioles 3-0

                        — Bryan Woo pitched seven shutout innings, Colt Emerson drove in two of Seattle’s three first-inning runs and the Mariners beat the Baltimore Orioles 3-0 on Thursday.
                        Atlantic League team forfeits game after some players refuse to wear Pride jersey

                        Atlantic League team forfeits game after some players refuse to wear Pride jersey

                        The Atlantic League Pro Baseball's York Revolution says it is forfeiting a game because some of its players refused to wear a special Pride Night jersey.
                        All MLB News
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