
The 49ers may wind up being without defensive lineman Arik Armstead for a prolonged period of time. Armstead missed the team’s Week 3 loss to the Broncos, and then left late in their Week 4 matchup with the Rams. The Week 3 absence and Week 4 exit were related to foot injuries that could ultimately land him on IR.
Armstead was out for Week 3 because of plantar fasciitis. That may have been manageable in the short term, but head coach Kyle Shanahan on Friday told reporters after practice that Armstead is dealing with another, non-plantar fasciitis injury.