EDEN PRAIRIE, Minn. -- The Minnesota Vikings placed Adrian Peterson on injured reserve Friday, meaning the running back will officially be out until at least mid-November.
Peterson had surgery Thursday to repair a torn meniscus in his right knee after he was injured in the third quarter of the Vikings' 17-14 win over the Green Bay Packers on Sunday night.
Recovery from a torn meniscus typically takes three to four months, meaning Peterson could miss all or most of the Vikings' remaining 14 games. The team can bring one player back off injured reserve after a minimum of eight weeks, and the NFL no longer requires clubs to designate a player for return upon placing him on IR.
The Vikings' decision, though, means that either Peterson or left tackle Matt Kalil is definitely out for the season. The Vikings placed Kalil on injured reserve this week with a torn labrum in his right hip, and would not be able to bring both Peterson and Kalil back from IR.