EDEN PRAIRIE, Minn. — Adrian Peterson will have surgery on his right knee to repair a torn meniscus, putting his season and perhaps his 10-year run with Minnesota in question.

But the Vikings have held off for now on placing the franchise's all-time leading rusher on injured reserve.

Peterson was hurt in Sunday night's victory over Green Bay, needing assistance off the field after his knee twisted while being tackled at the end of a run. He has only 50 yards on 31 attempts this season.

Peterson told ESPN on Wednesday morning that the type of tear he was diagnosed with typically requires a minimum recovery time of three to four months. But Vikings coach Mike Zimmer said the timetable for Peterson's return won't be clear until after the procedure.

"Everything is possible," Zimmer said. "It could be season ending. It could be three weeks, four weeks. I don't know."

The Vikings (2-0) signed running back Ronnie Hillman, who was on Denver's Super Bowl-winning team last season. Jerick McKinnon will start on Sunday at defending NFC champion Carolina, and Matt Asiata has proven to be a capable backup.