MRI confirms sprained knee for Redskins' Williams
Coach Jay Gruden said Monday Williams is ''day to day,'' but that rookie Morgan Moses will be ready to take over if the two-time Pro Bowl player can't play against San Francisco.
Williams sprained both his right MCL and right ankle in the first quarter of Sunday's 27-7 loss to Tampa Bay.
Also, guard Shawn Lauvao suffered a concussion on Sunday must undergo the league's mandated protocol before returning to practice.
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