The left-hander will be looked at by team physician Michael Ciccotti. The Phillies at this point have described the pain as soreness or tightness, and nothing more.
"We do not think it is serious, at least at this time," Phillies general manager Ruben Amaro Jr. said, according to MLB.com. "We thought it was important for Dr. Ciccotti to check him out and see if there is anything more serious than what we think it is."
According to Amaro, Hamels does not feel pain when he throws. Rather, the elbow tightens up on him between innings. Hamels pitched four innings in a minor league intrasquad game on Sunday.
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"I was able to throw yesterday," he said. "It's just been that kind of mild discomfort, something I don't want to have to deal with during the season. So if we can figure it out and somehow lessen the inflammation and the discomfort, I'll be able to throw and be productive."
Hamels has a history of injuries. Last season he pitched 262 1/3 innings, marking the first season in his eight-year professional career that he avoided the disabled list.
After his Sunday outing, the club said he still was on schedule to start on Opening Day -- April 5 at home against the Atlanta Braves -- although the plan could change.
"We won't know anything until the doctor sees him," Amaro said, according to MLB.com. "Right now he's still on course to do that. We'll see if there are any further issues. ... We don't feel that it's serious, but again, I don't have a crystal ball. I can't look inside his elbow."
