EDEN PRAIRIE, Minn. - Vikings Coach Mike Zimmer announced Monday that All-Pro running back Adrian Peterson has a torn meniscus in his right knee.
Zimmer shared the news at his Monday press conference with reporters at 2 p.m. At this point it is unclear if Peterson will be ready to play on Sunday.
"We're going through the evaluation process," he said. "We're still going through all the options."
The bad news follows a rough night for the running back -- AP was held to 19 yards on 12 carries against the Green Bay Packers before being helped off the field following the injury to his right knee in the third quarter of the regular season home opener at the sparkling new U.S. Bank Stadium.
Zimmer said after looking back at the play, it appears Peterson had his foot planted and was hit from the side.
Peterson was injured after a 5-yard run late in the third quarter. He was not able to put any pressure on his leg as he hobbled off the field, and the training staff had to help Peterson to the locker room for further testing.
In the after game press conference coach Zimmer said Peterson will get an MRI Monday morning but sounded optimistic, saying the injury had "calmed down."