When Adrian Peterson walked out of U.S. Bank Stadium on Sunday night, the Vikings running back was on crutches.

Even worse, Peterson’s leg was wrapped in a giant black knee brace. It wasn’t the kind of sight that could give a Vikings fan nightmares.

The Vikings running back was injured during the third quarter of Minnesota’s 17-14 win over the Packers, and although it’s not yet clear how serious the injury is, he’s likely going to miss at least a week, if not more, which means now is a good time to introduce to you to his backups.

Although the Vikings traded for a quarterback after Teddy Bridgewater got hurt, don’t look for that to happen if Peterson’s injury turns out to be serious. Instead, the Vikings will likely keep things in-house by promoting Matt Asiata or Jerick McKinnon to the starting role.

After Peterson went down, Asiata received the bulk of the carries on Sunday (six carries, 14 yards). However, that’s unlikely to continue. The fifth-year back is built like a brick, which means he’ll likely be the Vikings go-to guy in goal-line and short-yardage situations.

When Peterson sat out 15 games of the 2014 season, Asiata carried the ball 164 times for 570 yards and nine touchdowns.

As for McKinnon, he was a rookie in 2014, and carried the ball 113 times during Peterson’s absence. He only carried the ball twice against the Packers.

The good news for the Vikings is that Peterson might not be on the sideline for that long. After the win over the Packers, Vikings coach Mike Zimmer said that Peterson’s knee was already looking better.

“Whatever it was, it calmed down,” Zimmer said, via

Zimmer said that Peterson is scheduled to have an MRI on Monday morning and that team isn’t expecting the injury to be overly serious. If you have Peterson on your fantasy team, you’ll definitely want to hold on to him until the Vikings make an official announcement regarding his health.

Source: CBS Sports Headlines / Here are the Adrian Peterson backups you need to know