The Washington Redskins may be without some key members of their offensive line for a big divisional showdown Sunday versus the Dallas Cowboys.

Starting left tackle Trent Williams won't play after suffering a knee injury in last week's Monday night game, ESPN's Dan Graziano reports.

The team is also expecting to be without guard Brandon Scherff due to knee and back injuries, Mike Jones of USA Today reports.

Starting center Spencer Long reportedly has been ruled out as well due to knee and quad injuries, Master Tesfatsion of the Washington Post reports.

The Redskins and Cowboys are both 3-3 and meet Sunday at 4:25 p.m. ET.