The 49ers will have receiver Deebo Samuel for Sunday’s game against the Chargers.
The 49ers’ defensive line will take a hit this week, though.
Defensive end Nick Bosa, who has 8.5 sacks, is the only 49ers’ starting defensive lineman available Sunday.
It will mark the fifth consecutive game Armstead has missed with plantar fasciitis of his right foot and a hairline fracture of his left fibula.
Running back Elijah Mitchell will return from injured reserve, coach Kyle Shanahan announced Friday. Linebacker Azeez Al-Shaair, offensive tackle Colton McKivitz and defensive end Jordan Willis also are ready to return.