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    Sean O'Sullivan

    SeanO'Sullivan

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

    Career Stats

    • W-L
      13-23
    • ERA
      6.01
    • K
      158
    • WHIP
      1.58
    • Overview
    • News
    • Stats
    • Bio
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    • Game Log

    MLB Quick Links

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    Career Pitching

    See All
    Stats
    Career
    GPGSCGSHOIPHRERHRBBK
    715600323.239822621659115158
    Latest News
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    Racing Positions

      • Red Sox demote Vazquez, send Buchholz to pen
        • 10Y
        • Kyle Brasseur
        Buchholz
        • Red Sox keep slow-starting Buchholz in rotation
          • 10Y
          • Tony Lee
          Clay Buchholz
          • Reds OF Byrd fractures wrist on HBP vs. Phillies
            • 2Y
            Marlon Byrd
            • D-backs dump Thomas, add prospect Waldschmidt
              • 2h
              D-backs dump Thomas, add prospect Waldschmidt
              • Sources: Dodgers' Snell (shoulder) to debut Sat.
                • 2h
                • Alden Gonzalez
                Sources: Dodgers' Snell (shoulder) to debut Sat.
                • Fantasy baseball lineup advice for Saturday: Nola looking to keep momentum going
                  • 3h
                  • ESPN Fantasy
                  Fantasy baseball lineup advice for Saturday: Nola looking to keep momentum going
                  • Yankees become only MLB team with two 6-foot-7 position players on the roster
                    • 4h
                    • ESPN Staff
                    Spencer Jones of the New York Yankees talks to a teammate at Steinbrenner Field.
                    • Marlins No. 2 prospect Snelling set for MLB debut
                      • 5h
                      Miami Marlins pitcher Robby Snelling works out during spring training baseball, Sunday, Feb. 15, 2026, in Jupiter, Fla.
                      • Fantasy Baseball Forecaster for Week 7: May 11-17
                        • 10h
                        • Tristan H. Cockcroft
                        Pitcher Freddy Peralta #51 of the New York Mets reacts after an out to end the top of the sixth nning of a game against the Washington Nationals at Citi Field.
                        • Fantasy baseball forecaster: Team hitting ratings
                          • 11h
                          • Tristan H. Cockcroft
                          Los Angeles Dodgers first baseman Freddie Freeman (5) rounds third base to score in the third inning against the Los Angeles Angels at Dodger Stadium.

                        MLB News

                        D-backs promote top prospect Ryan Waldschmidt, DFA Alek Thomas

                        D-backs promote top prospect Ryan Waldschmidt, DFA Alek Thomas

                        The struggling Arizona Diamondbacks have shaken up their roster.
                        Dodgers LHP Blake Snell to come off IL, sources say

                        Dodgers LHP Blake Snell to come off IL, sources say

                        The Dodgers are expected to start Blake Snell on Saturday after he missed the start of the season with left shoulder fatigue, sources told ESPN. His return might present a logjam in the team's starting rotation.
                        Fantasy baseball lineup advice for Saturday: Nola looking to keep momentum going

                        Fantasy baseball lineup advice for Saturday: Nola looking to keep momentum going

                        Everything you need to know to set your fantasy baseball lineups for Saturday's MLB action.
                        Yankees become only MLB team with two 6-foot-7 position players on the roster

                        Yankees become only MLB team with two 6-foot-7 position players on the roster

                        With Spencer Jones and Aaron Judge on the roster, the Yankees have reached new heights.
                        Robby Snelling, Marlins' No. 2 prospect, set for MLB debut

                        Robby Snelling, Marlins' No. 2 prospect, set for MLB debut

                        Pitcher Robby Snelling, the Marlins No. 2 overall prospect, will make his MLB debut Friday against the Nationals.
                        Fantasy Baseball Forecaster Week 7: May 11-17

                        Fantasy Baseball Forecaster Week 7: May 11-17

                        Set your lineups for the week ahead in fantasy baseball with our preview featuring pitcher rankings, hitter ratings and schedule observations.
                        All MLB News
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