Washington elevated Armah from its practice squad prior to Tuesday's game against the Eagles.
Though he's a fullback by trade, Armah took some reps at tight end in practice this week and could serve as the lone depth option at the position Tuesday behind John Bates in the event Ricky Seals-Jones (illness) -- who is listed as questionable -- isn't cleared to play. In nine appearances with the Saints earlier this season, Armah was deployed mostly as a blocker. He logged five carries for 21 yards and scored on a one-yard reception on his lone target across 67 snaps on offense.