Allen (knee) didn't participate in Wednesday's practice, Rhiannon Walker of The Athletic reports.

EDGE Analysis

Allen also wasn't present on the team's rehab field, so they're clearly taking precautions on the third-year defensive end. The Redskins' pass rush will clearly take a hit in Sunday's game versus the Cowboys if he can't play, especially since Caleb Brantley (ankle) is also hurting. Treyvon Hester will likely start if Allen or Brantley can't go.