But Comcast SportsNet reported Monday that Hamels had an MRI exam as a precautionary measure. Results are not expected until Tuesday. Hamels said he felt no pain in the shoulder, leaving him to believe it is a "dead arm" period many pitchers experience throughout the course of the season.
"Right now [a dead arm is] what we think it is, yeah," Phillies pitching coach Rich Dubee said Saturday. "The funny thing is, he warmed up in San Francisco and he said, 'Boy, my arm is heavy.' So we just talked about angling the ball, and he goes out and he pitches a gem. Then his side session in between then and now was fabulous. His arm rebounded, felt great. So it's a combination of workload, combination of east-west. Or west-east, whatever you want to call it. Just everything building up."
Hamels is tied with teammate Cliff Lee for third in the National League with 172 innings pitched. Roy Halladay is tied for first with Clayton Kershaw with 175 2/3 innings pitched.
The possibility exists that Hamels could skip at least his next start to help his arm recover.
Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.