Right tackle Mike Remmers returned to practice this week, providing hope he could make his way back to the playing field this Sunday from an Oct. 29 concussion.
But Remmers wore a beanie instead of a helmet as he watched his teammates at the start of Friday's practice, two days before the NFC North-leading Vikings (7-2) host the NFC West-leading Rams (7-2). He's been ruled out, according to head coach Mike Zimmer.
Rashod Hill is expected to start again at right tackle.
The Vikings will also be without safety Andrew Sendejo, who has not practiced all week while resting groin and hamstring injuries.
Defensive end Brian Robison left practice after warmups due to a back injury. The veteran is listed as questionable to play after practicing Wednesday and Thursday without issue.
Also questionable is defensive end Everson Griffen, who has said he'll "for sure" make his return against the Rams. He's been nursing a foot injury suffered Oct. 29 against the Browns.