Armstead out with sprained knee

Niners DL Arik Armstead is expected to miss "a few weeks" after spraining his right knee this week. That's what HC Kyle Shanahan told reporters Friday, according to ESPN's Nick Wagoner. Armstead reportedly thought it was a bruise at first, but MRI revealed the more significant injury. There's still time for the vet to work beyond the issue ahead of the regular season. We'll see, though, whether it remains a factor come Week 1. Armstead opened camp as a DT this year after shifting between end and tackle in 2021.