The Phillies selected the contract of pitcher Sean O'Sullivan from Triple-A Lehigh Valley Sunday, designated pitcher Cesar Jimenez for assignment in a corresponding move.
O'Sullivan will take the mound as the team's starter against the Nationals Sunday. Jimenez retired the two batters he faced in his only appearance with the Phillies before being shipped off the roster.
The Phillies are heavy home underdogs (+180) against the Nationals and Max Scherzer Sunday.