The team announced Saturday that No. 2 receiver Markus Wheaton will miss Week 1 with a shoulder injury.
Wheaton didn't participate in practice this week.
It's a big opportunity for Coates, who flashed during offseason practices, but struggled in the preseason.
One of the most explosive offenses last season is a shell of itself to open the year, but at least still has Big Ben and AB.
Other Monday Night Football injury report notes:
- The Redskins listed running back Matt Jones, rookie receiver Josh Doctson, defensive end Kendall Reyes, nose tackle Kedric Golston and guard Spencer Long as questionable. Jones was full-go all week and will suit up Monday. Doctson participated fully on Saturday after being limited all week. With a deep receiver corps, the Redskins could ease the rookie receiver into the lineup.
- The 49ers listed Arik Armstead (shoulder) as questionable to play against the Rams. Fellow defensive linemen Quinton Dial and Glenn Dorsey are also questionable with knee injuries. Cornerback Chris Davis (hamstring) is doubtful, while two more defenders, linebacker Nick Bellore (knee) and corner Keith Reaser (ankle), are also questionable for Monday night.