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.

Tackles Ty Nsekhe and Morgan Moses having been playing through injuries, and the team was forced to sign offensive linemen Jonathan Cooper, Austin Howard and Luke Bowanko last week. Cooper started at left guard, and Howard is the Redskins' new swing tackle.

Gruden said wide receiver Jamison Crowder, who has missed the past five games with an ankle injury, would have an MRI with an eye toward practicing Thursday. Williams won't practice this week, Gruden said, adding that the team is continuing to take a wait-and-see approach with third-down back Chris Thompson, who has missed the past two games with a rib injury.

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