The Phillies have added pitcher Sean O'Sullivan to the 40-man roster.
O'Sullivan is scheduled to start Game 2 of Saturday's doubleheader against the Braves. The team designated infielder Ronny Cedeno for assignment after Game 1 to clear a 40-man roster spot for the pitcher. O'Sullivan has made 15 starts for Triple-A Lehigh Valley, going 3-6 with a 4.31 ERA and 47:28 K:BB ratio in 87 2/3 innings.