FILE - In this Dec. 11, 2013 file photo, Washington Redskins quarterbacks Kirk Cousins, left, and Robert Griffin III, center, walk behind head coach Mike Shanahan, during their NFL football practice Wednesday, Dec. 11, 2013, in Ashburn, Va. If these are indeed Mike Shanahan's final days with the Washington Redskins, his legacy will be one of an inability to make things work with his quarterbacks, from Donovan McNabb to Rex Grossman to John Beck to Robert Griffin III. (AP Photo/Alex Brandon)