On the heels of arguably their most dramatic win of the season, the Phillies are left dealing with an unsettled injury situation.

Carlos Ruiz suffered a right hamstring strain while running the bases in Sunday's 3-2 comeback victory over the Cincinnati Reds at Citizens Bank Park.

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Ryan Howard did not play because of a sore left knee, an injury he traced back to spring training. Howard was replaced by Michael Young, who played his first game at first base since Sept. 28 of last season while with the Texas Rangers.

And there is still the situation of setup man Mike Adams, who has not pitched since May 10 because of back spasms and is listed as day-to-day.

Ruiz will undergo an MRI exam on Monday. He said he would not rejoin the Phillies until Tuesday in Miami, but any plans could change based on the results.

Hamstrings are difficult injuries. Ruiz was hurt in the second inning when he went to third on a Freddy Galvis single. The catcher stayed in the game but departed after the inning. He was replaced by Erik Kratz.

"It is sore," Ruiz said afterward in the Phillies clubhouse.

Ruiz knew something was wrong as he limped the final few steps to third. "I felt a little bit of a pop," he said.

Because the team needs two healthy catchers, Humberto Quintero will join the Phillies in Miami as insurance in case Ruiz lands on the disabled list.

Ruiz, who was suspended the first 25 games for Adderall use, has been on the disabled list in each of the last four seasons.

Howard also will undergo an MRI exam Monday in Philadelphia. He will fly to Miami in the afternoon.

When asked if Howard would play Monday, manager Charlie Manuel said, "I don't think so, really. I will be surprised if he does."

Howard said that the injury has been flaring up since spring training and that Saturday "was probably kind of the worst day I felt it."

Adams played catch Sunday and said his back felt "a lot better, actually." When asked if he could avoid the disabled list, Adams dodged the question.

"I don't know how to answer that," he said.

Adams hurt his back May 12 while shagging a fly ball in batting practice.

The timing of the other injuries complicates things. If Ruiz's examination reveals a significant injury, he will go on the DL to add Quintero. If it's an injury that needs a few days, Adams could go on the DL to clear space.

Cloyd earns start

Tyler Cloyd, who enjoyed a solid first start with the Phillies on May 10 before being sent back to triple-A Lehigh Valley, will start for the Phils Tuesday in Miami.

The Phillies said a roster move will be made to accommodate Cloyd, who doesn't know how long he will be in the rotation.

"They haven't told me anything," Cloyd said. "I prepared myself for Miami and will see whatever happens after that."

Pitching prospect Adam Morgan will not start as scheduled for triple-A Lehigh Valley on Monday because of an unspecified injury, the Allentown Morning Call reported.

Morgan has not pitched well lately but was under consideration to join the Phillies when Jonathan Pettibone was first called up to replace John Lannan. Pettibone made his first Phillies start on April 22.