49ers defensive end Nick Bosa did not practice Wednesday, sitting out with what coach Kyle Shanahan called hamstring “irritation.”
It’s the first time the NFL’s current sack leader and defensive player of the year candidate has appeared on the practice report with an injury since Week 7. He had two limited practices that week with a groin injury.
Bosa had not missed a practice for injury since Oct. 13.
Armstead played 21 snaps in his first game back since Week 4.
“He got through the game well,” 49ers coach Kyle Shanahan said, via David Bonilla of 49erswebzone.com. “We’ve got to be smart with him, so it doesn’t act up like it did earlier in the year, but he had a successful game.”