ASHBURN, Va. (AP) Rookie tackle Geron Christian is out for the rest of the season in the latest significant injury to the Washington Redskins' offensive line.

Coach Jay Gruden said Monday that Christian will miss the final seven games of the regular season and any in the playoffs after tearing the medial collateral ligament in his right knee. Christian, the Redskins' third-round pick who was forced into action by a bevy of injuries, hurt his knee Sunday at Tampa Bay.

Christian's season-ending injury is the third along Washington's offensive line after knee injuries to starting guards Brandon Scherff and Shawn Lauvao. Starting left tackle Trent Williams is expected to miss his third consecutive game this week against the Houston Texans after surgery for a dislocated right thumb.