Valdez (back) was activated from the 10-day injured list Sunday.
Valdez landed on the shelf with a lower-back strain June 21 and will rejoin the Orioles without requiring a rehab assignment. The veteran righty is 8-for-12 in save chances with a 5.74 ERA and 1.65 WHIP this season. He could remain in the mix for high-leverage spots, but Paul Fry and Cole Sulser could be first up for saves since they have pitched better overall.