Valdez is out of the lineup for Friday's game against San Diego, Christopher Smith of MassLive.com reports.
Despite the Red Sox facing a right-hander in Randy Vasquez, Valdez will take a seat, yielding to David Hamilton at second base while Ceddanne Rafaela fills in at shortstop. Valdez is slashing .212/.267/.404 with six home runs in 162 plate appearances this season.