Sean O'Sullivan took a loss Friday against the Nationals after giving up four runs over five innings.
Sean O'Sullivan pitched surprisingly well opposite Max Scherzer on Sunday, holding the Nationals to two runs over six innings in a no-decision.
Phillies purchased the contract of RHP Sean O'Sullivan from Triple-A Lehigh Valley.
Sean O'Sullivan will start Sunday against the Nationals.
MLB.com's Todd Zolecki reports that Sean O'Sullivan "is the in-house favorite" to be the Phillies' No. 5 starter.
Phillies reassigned RHP Sean O'Sullivan and C John Hester to minor league camp.
Phillies re-signed RHP Sean O'Sullivan to a minor league contract with an invitation to spring training.
Phillies released RHP Sean O'Sullivan.
Phillies sent RHP Sean O'Sullivan outright to Triple-A Lehigh Valley.
Sean O'Sullivan has accepted his assignment to Triple-A Lehigh Valley.
Phillies designated RHP Sean O'Sullivan for assignment.
Sean O'Sullivan made an emergency start against the Astros on Thursday and struggled, allowing five runs over six innings but didn't factor into the decision as the Phillies came from behind late to win 6-5.