But the Rangers opted not to make any moves so Perez stays on the active roster even though he won't pitch Wednesday.
"We not through evaluating [Perez] yet," manager Ron Washington said. "We're still trying to get more information. Right now we're going to wait until Wednesday and get more information. If he is going to miss just one start, we'll do something else. If he has to go on [the DL], we'll wait until Wednesday. When we get back home [on Friday], I hope to have a full roster."
Perez, after throwing back-to-back shutouts and 26 consecutive scoreless innings, is 0-3 with a 12.83 ERA in his last three starts and reported discomfort in his elbow during his last outing against the Red Sox on Saturday.
"I just want to miss one start and get ready for the next one," Perez said Sunday. "It was a little inflammation. That's why I was too tight. I'll feel all right."
T.R. Sullivan is a reporter for MLB.com. Read his blog, Postcards from Elysian Fields, and follow him on Twitter @Sullivan_Ranger. This story was not subject to the approval of Major League Baseball or its clubs.