PHOENIX -- Phillies right-hander Mike Stutes isn't sure what to make of his injured right shoulder.

The Phillies placed him on the 15-day disabled list Tuesday because of inflammation in the shoulder. He battled shoulder problems during Spring Training but the Phillies said they think this problem might be different.

"It could be related. It could not be," Stutes said Wednesday morning at Chase Field. "I have no idea."

Stutes, who last pitched Saturday in San Diego, said he has felt some discomfort in his shoulder for a while.

"It was just kind of a weird feeling," he said. "It just didn't feel right. I wouldn't say it was excruciatingly painful where I couldn't hold the ball or anything. It's not anything like that. It's just not right. It doesn't allow me to throw how I normally throw."

Stutes could have a MRI exam Thursday in Philadelphia.

Right-hander Michael Schwimer replaced Stutes on the roster. He was 1-0 with a 1.04 ERA and two saves in 8 2/3 innings with Triple-A Lehigh Valley.

"Yeah, the numbers -- they were good, but nine innings isn't a sample size that can qualify as throwing it real well or anything like that," Schwimer said. "In terms of executing the pitches I want to execute, much, much better than I was last year. I'm very happy with how my game's going right now."

Rollins takes breather after struggling on road

PHOENIX -- It has been a rough road trip for Jimmy Rollins, so he got a breather Wednesday at Chase Field.

Phillies manager Charlie Manuel started Freddy Galvis at shortstop and Pete Orr at second base against D-backs right-hander Trevor Cahill. It was the first time Rollins was not in the starting lineup this season, but Rollins needed it. He is hitting just .091 (3-for-33) in the first nine games of this 10-game road trip through San Francisco, San Diego and Arizona.

"This will give him a day off today and tomorrow," Manuel said. "I needed to give him a blow."

De Fratus suffers setback in rehab

PHOENIX -- Phillies right-hander Justin De Fratus suffered a setback in his rehab.

The Phillies announced Wednesday he has been shut down for four weeks with a strained flexor pronator in his right elbow. De Fratus missed most of Spring Training because of an elbow problem. He had been rehabbing recently.

Last season with Triple-A Lehigh Valley, De Fratus had a 3.73 ERA with seven saves in 28 appearances.

Worth noting

• Pete Orr went 2-for-4 with three RBIs in Tuesday's 8-5 victory over Arizona. It was the first time Orr had three RBIs in a game in his career, which spans 397 games. Elias Sports Bureau said Orr's 396 games without a three-RBI game were the most of any active position player. Kansas City's Chris Getz now holds the current streak at 319 games.