Perez is hitting .158 with one homer and two RBIs in 38 at-bats this season.
Adrianza is hitting .213 with four RBIs in 75 at-bats this season, but the 24-year-old had made improvements lately; he currently has a five-game hit streak and has hit .333 (6-for-18) in that span.
Another roster move could be looming, as Angel Pagan's status with lower back stiffness remains on a daily basis of re-evaluation.
Chris Haft is a reporter for MLB.com. Read his blog, Haft-Baked Ideas, and follow him on Twitter at @sfgiantsbeat. Ryan Hood is an associate reporter for MLB.com. Follow him on Twitter @ryanhood19. This story was not subject to the approval of Major League Baseball or its clubs.