Vikings defensive starters Xavier Rhodes and Sharrif Floyd will miss Sunday night's game against the Packers because of knee injuries.

And Vikings coach Mike Zimmer is keeping his starter at quarterback under wraps until Sunday.

Cornerback Rhodes and defensive tackle Floyd missed practice all week.

Floyd has had an injury-plagued career.

"I'm kind of used to it," Zimmer said, later adding, "I guess some guys just get hurt."

"I don't know what to call it," Floyd said, who has missed the bulk of seven games since the start of the 2014 season. "Some things you can't fight through."

Zimmer said he would name his starting quarterback — Sam Bradford or Shaun Hill — on Sunday. Asked if Bradford was ready to start, Zimmer said, "he could — Shaun's ready to go too."

Matt Kalil donned his helmet and rejoined the offensive line at the start of Friday's practice at Winter Park. Kalil, who has been bothered by a hip injury this week, will likely avoid missing his first career NFL start on Sunday. He had been held out of practice on Wednesday and Thursday, participating Friday at least on a limited basis, and is listed as questionable for the game.

Second-year cornerback Trae Waynes is likely in line for his third career NFL start, first against Aaron Rodgers. Defensive tackles Shamar Stephen and Tom Johnson could fill in the gaps for Floyd.

Tight end MyCole Pruitt (knee) was also declared out for the game.