The Vikings placed cornerback Patrick Peterson on the COVID-19 reserve list on Monday, meaning they could be without another defensive starter on Sunday against the Lions.
Peterson said before the season he is vaccinated against COVID-19, so his placement on the reserve list suggests he tested positive for a breakthrough case of the virus. If he is asymptomatic, he can return with two negative tests taken at least 24 hours apart; if Peterson has symptoms, he would need two negative tests at least 24 hours apart and 48 hours without symptoms before he can come back. Otherwise, he would have to be away from the team for 10 days.
Coach Mike Zimmer, though, didn't sound optimistic Monday evening about the prospect of Peterson testing out of the COVID-19 protocol before Sunday's game.
"Not too many guys have passed those two negative tests, so you just have to let it play out and see where it goes," Zimmer said.
He missed three games with a hamstring injury before returning for the Vikings' win over the Packers on Nov. 21; Peterson played all 70 snaps in the team's loss to the 49ers on Sunday.
The Vikings played Sunday without their four preferred defensive linemen (Danielle Hunter and Michael Pierce are on injured reserve, Dalvin Tomlinson is on the COVID-19 list and Everson Griffen is away from the team while receiving mental health treatment). Tomlinson, who went on the COVID-19 list Nov. 23, could return in time for the Lions game, but in addition to the possibility of not having Peterson, the Vikings might be without Anthony Barr, who strained his hamstring during Sunday's game.
Zimmer said coaches have to go back to the drawing board as they adjust the plans amid personnel changes and allowing 400 yards in back-to-back games.
"We're going to have to put our heads together here a little bit this week and see how we can adjust," Zimmer said, "and change to do some of the things that these guys can do [well]."