Washington Commanders guard Wes Schweitzer. Scott Taetsch-USA TODAY Sports

The Commanders have been dealt another blow on the offensive front. Veteran interior lineman Wes Schweitzer has been placed on IR, per a team announcement. The news comes after he was held out of practice this week with a concussion, and guarantees that he will miss at least the next four games.

The 29-year-old played every snap in the team’s Week 3 loss to the Eagles, after missing the previous contest and leaving the season opener early. He began the year as the starting right guard, but changes were required after center Chase Roullier suffered a major knee injury. That shifted Schweitzer to the middle, though he did nothing to help his PFF rating for the year. With a pass protection grade of 21.6, the San Jose State product has given up six pressures in limited action this year.

In a corresponding move, Washington has elevated Nick Martin from the practice squad. The veteran signed just over one week ago as an insurance option in the wake of Roullier’s injury. The former Texans second-rounder was a full-time starter during his time in Houston, but he was relegated to backup duties last year with the Raiders. The absence of both Roullier and Schweitzer could clear the way for him to once again take on first-team duties.

Elsewhere on the O-line, left tackle Charles Leno is dealing with a shoulder injury, though he is expected to play on Sunday. Still, with Schweitzer joining Roullier and reserve linemen Willie Beavers on IR, the unit will be one to watch as the Commanders look to move to 2-2 against the Cowboys.

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