O'Sullivan was designated for assignment Sunday. The team indicated earlier in the week that O'Sullivan's rotation spot would not be in jeopardy after he surrendered five runs (including three homers) in six innings Thursday vs. the Astros, but that changed when Jerome Williams became available off waivers. Williams is expected to immediately displace O'Sullivan in the rotation and start Tuesday vs. the Angels.

O'Sullivan will stay in the Phillies' rotation and will make his next start Tuesday, the Philadelphia Inquirer reports. O'Sullivan took Roberto Hernandez's rotation spot after he was traded to the Dodgers last week. He will face the Angels on Tuesday.

O'Sullivan made a spot start against Houston on Thursday, allowing five runs and seven hits in six innings, He issued two walks and struck out four. Roberto Hernandez was supposed to start Thursday, but he was traded to the Dodgers earlier in the day, so O'Sullivan was called up from Triple-A Lehigh Valley. He settled down nicely after allowing three homers early in the game, including a pair of long balls to slugger Chris Carter. If Philadelphia decides to keep O'Sullivan in the rotation, his next start would be on the road against the Angels.

O'Sullivan will start Thursday's game against the Astros, MLB.com's Brian McTaggart reports. The Phillies traded Thursday's starter, Roberto Hernandez, to the Dodgers during the day, so they decided to call up O'Sullivan to take his place in the rotation. O'Sullivan started one game for the Phillies earlier this season and gave up four earned runs over 5.2 innings in a home loss to the Braves.

The Phillies selected O'Sullivan's contract from Triple-A Lehigh Valley on Thursday, Todd Zolecki of MLB.com reports. O'Sullivan takes the roster spot of Roberto Hernandez, who was traded to the Dodgers. He last pitched on Aug. 2, which presumably means he will start in place of Hernandez on Thursday night.

Phillies sent RHP Sean O'Sullivan outright to Triple-A Lehigh Valley. O'Sullivan cleared waivers after being designated for assignment by the Phillies over the weekend. The 26-year-old has the option to reject the assignment to Triple-A and choose free agency.

Phillies designated RHP Sean O'Sullivan for assignment. O'Sullivan allowed four earned runs in 5 2/3 innings in a spot start Saturday versus the Braves. He seems likely to clear waivers and remain in the organization as depth.

Sean O'Sullivan surrendered four earned runs in 5 2/3 innings Saturday in a loss to the Braves. It was the second the half of a doubleheader and the Phillies lost both games. O'Sullivan did not walk a batter, but the Braves got to him for eight hits. He'll likely be sent back to Triple-A on Sunday morning.

Phillies purchased the contract of RHP Sean O'Sullivan from Triple-A Lehigh Valley. O'Sullivan is starting for the Phillies in the second half of Saturday's doubleheader against the Braves. The right-hander will be sent back to Triple-A on Sunday.

Sean O'Sullivan will start the second game of Saturday's doubleheader against the Braves. He'll follow Roberto Hernandez. Signed to a minor league deal over the winter, O'Sullivan holds a 4.31 ERA with 47 strikeouts over 87 2/3 innings at Triple-A Lehigh Valley this season. He should be avoided in fantasy leagues.