Valdez pulled his left hamstring late in Saturday's 3-2 win over the Brewers. Utley left Wednesday's game against Atlanta in the bottom of the eighth inning after being hit in the helmet by a pitch in the sixth. He has not played since.
"He's not available today," Phillies manager Charlie Manuel said of Valdez. "[Utley] went to the doctor today. I hadn't heard anything more."
Manuel said he has no plans to make any personnel changes to compensate for the temporary loss of the two infielders.
"We've got what we got," Manuel said.