Zimmer: RB Adrian Peterson (knee) 'might miss a week'

A knee injury knocked Adrian Peterson out of the Vikings’ 17-14 win over Green Bay in the third quarter on Sunday night.

After the game, Peterson was on crutches in the locker room with a black brace supporting his right knee. Head coach Mike Zimmer said Peterson would undergo a magnetic resonance imaging scan on Monday morning. Asked if the injury might be serious, Zimmer said “it could,” but reiterated the MRI would be needed to know the extent of the damage.

“He might miss a week, I don’t know if he will or not,” Zimmer said. “Whatever it was has calmed down now, so we’ll see.”

Peterson struggled with 19 yards on 12 carries when he was on the field, another subpar fantasy performance. While we'll continue to monitor for updates, Zimmer's timetable of possibly missing a week seems somewhat encouraging but it looks like owners should have a backup plan. Jerick McKinnon and Matt Asiata would fill in for Peterson if he misses time with McKinnon seeming like the better option as a fantasy replacement.