Commanders rule out DE Dorance Armstrong (rib) vs. Panthers

(Photo credit: Matt Kartozian-Imagn Images)
Washington Commanders defensive end Dorance Armstrong won't play Sunday against the visiting Carolina Panthers because of a rib injury, coach Dan Quinn said Friday.

Quinn also ruled out rookie safety Tyler Owens (shin) and said starting running back Brian Robinson Jr. (knee) is "trending in the right direction" and a decision will be made this weekend. Robinson did not practice