MIAMI -- Chase Utley knows he needs to be smart about this.
He felt a burning sensation in his right rib cage taking swings in the batting cage before Tuesday's game at Marlins Park. He got scratched from the lineup a short time later, did not play in Wednesday's series finale against the Marlins and will have an MRI exam Thursday in Philadelphia.
It seems likely Utley will miss time, with a trip to the disabled list a good possibility.
"It definitely scared me a little bit," he said Wednesday. "My first swing I took in BP, I felt something. My second swing, I felt it again. My third swing, I felt it again. After the fourth swing, I realized something wasn't right. That's when I told Charlie [Manuel] I have some pain in my side. He told me to go see [head athletic trainer] Scott [Sheridan]. He took me out of the game. I think it was a smart thing to do. You want to be careful with these things, because they could linger and get worse if you try to play through it. I think we caught it early enough, but it's hard to know until we have some imaging on it."
Utley said he felt about the same as Tuesday, not great, but not terrible.
"It's kind of in-between," he said.
Utley has spoken with teammates and former teammates who have had similar injuries in the past. Several Phillies pitchers have spent time on the DL in recent seasons because of strained obliques, but so have position players like catcher Carlos Ruiz and former Phillies outfielder Jayson Werth. Ruiz spent 23 days on the DL in 2009, while Werth spent 15 days.
"The main thing they said was, 'Don't rush back,'" he said. "That's when you can make it worse and prolong the time you're out."
Utley has been one of the team's few bright spots this season. He is hitting .272 with seven doubles, two triples, seven home runs and 25 RBIs in 44 games. He has an .814 on-base-plus-slugging percentage, which ranks seventh out of 20 qualifying second basemen in baseball. He has missed much of the previous two seasons because of chronically injured knees, but the knees have not been an issue so far.
"I just hit into a little bad luck," he said. "I have felt pretty good. Hopefully, this is just a small bump in the road."
If Utley lands on the DL, the Phillies have a few candidates to replace him, including Triple-A infielders Pete Orr, Michael Martinez and Cesar Hernandez. Darin Ruf could be a possibility with games in Boston on Monday and Tuesday, when he could be used as a designated hitter.
On the mend, Adams throws bullpen session
MIAMI -- Phillies setup man Mike Adams took a step closer to his return Wednesday when he threw a bullpen session at Marlins Park.
Adams is on the disabled list because of a strained back. He is scheduled to throw another bullpen session Friday in Clearwater, Fla., and make an appearance in a rehab game Monday with Class A Clearwater.
If everything goes well, he could be activated Tuesday or Wednesday.
Halladay begins rehab program in Florida
MIAMI -- Phillies right-hander Roy Halladay reported Monday to Bright House Field in Clearwater, Fla., to begin a rehab program following right shoulder surgery.
Phillies general manager Ruben Amaro Jr. said Halladay feels like he has pretty good range of motion.
"I talked to him [Tuesday]," Amaro said. "He's pretty positive."
If everything goes well, Halladay could pitch again for the Phillies as early as late August.
Amaro also said left-hander John Lannan, who is on the disabled list with an injured left knee, is scheduled to throw to hitters next Wednesday in Clearwater. Amaro said Lannan "is doing very well. He feels good."
Right-hander Carlos Zambrano is scheduled to throw in an extended spring game Thursday in Clearwater.
Lidge to retire Aug. 1 as member of Phillies
MIAMI -- The Phillies announced Wednesday that Brad Lidge will formally retire as a member of the Phillies before their Aug. 1 game against the Giants at Citizens Bank Park.
Lidge recorded the final out in Game 5 of the 2008 World Series to give the Phillies their second World Series championship in franchise history.
"I had my greatest moment at Citizens Bank Park and I would like to officially retire as a member of the Phillies organization," Lidge said in a statement.
Lidge will throw out the first pitch. He is hoping he throws the pitch to Carlos Ruiz.
Aumont optioned to Triple-A; Stutes recalled
MIAMI -- The Phillies optioned right-handed reliever Phillippe Aumont to Triple-A Lehigh Valley following Wednesday's 3-0 victory over the Marlins at Marlins Park and recalled Michael Stutes from Triple-A on Thursday.
The right-handed Stutes will be available for Friday night's game in Washington.
Aumont went 1-3 with a 4.15 ERA in 16 appearances, allowing 17 hits, eight runs, 10 walks and striking out 15 in 13 innings.
"We wanted Aumont to get some regular work in and work on his command," manager Charlie Manuel said. "He has all the potential in the world. One of these days, Aumont has a chance to be a big-time back-end bullpen piece. But right now, he needs to pitch and get regular work in to develop his pitches. This way, he'll get to use it. We're going to always need pitchers. He's definitely high on our radar as a prospect."
At Lehigh Valley, Stutes went 1-2 with a 3.33 ERA in 20 appearances and allowed just one run in his past 11 appearances.
Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.