Beat writer John Keim hears that LG Kory Lichtensteiger tore his ACL and MCL in the first quarter of Sunday's game against the Eagles. If the report is true, Lichtensteiger is done for the season. It would be a major blow to a Redskins' line that was posting positive production this season for the first time in years. Erik Cook has been inserted at center, moving Will Montgomery to left guard.