Savery last pitched July 13, throwing a scoreless inning in a 13-inning victory over the White Sox. He is 2-0 with a 1.38 ERA in 10 appearances.
"He was having trouble with his elbow," Phillies manager Charlie Manuel said.
Valdes was 1-0 with a 7.65 ERA in 10 appearances earlier this season with the Phillies before being demoted to Triple-A Lehigh Valley. He pitched as a starter with the IronPigs, going 3-4 with a 3.11 ERA in 12 starts.
Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.