The Minnesota Vikings have placed Adrian Peterson on injured reserve, but both sides are hopeful for a December return in the event of a playoff run.

Peterson, 31, is due a huge salary in 2017, but the Vikings have no plans to sever the relationship.

Minnesota wants Peterson to retire as a valued member of the organization, according to two sources.

The two sides could come to an agreement on a renegotiated salary.

Adrian Peterson has decided to undergo surgery to repair his torn meniscus, forcing him to miss three to four months.

Peterson, who was injured Sunday, told ESPN's Josina Anderson that he has a "bucket handle tear" of the meniscus, which typically has a minimum recovery time of three to four months.

"(I'm) doing it with faith and optimism," Peterson told ESPN of the procedure.

Peterson had been provided with multiple options about how to treat the injury, and he had been waiting to hear back from Dr. James Andrews, who performed extensive surgery on Peterson's knee in 2011, before making his decision.

Peterson slightly twisted his knee at the end of a 5-yard run Sunday against the Packers. 

Doctors later found Peterson also has a torn lateral collateral ligament, which will further decrease his odds of returning in 2016.

The Minnesota Vikings have signed Ronnie Hillman.

Hillman will give the Vikings depth at running back with Adrian Peterson anticipated to miss a few games with a torn meniscus.

Hillman was cut by the Broncos before the start of the 2016 season.

Adrian Peterson suffered a torn meniscus in his right knee 

Mike Zimmer said a timetable for Peterson's return is uncertain at this point though he could even play in Week 3.

Peterson had gained only 19 yards on 12 carries.

Peterson suffered a devastating left knee injury in 2011 -- tearing both his ACL and MCL ligaments.

Adrian Peterson left the Minnesota Vikings' Week 2 win over the Green Bay Packers in the third quarter with a knee injury.

Peterson will get an MRI on the knee Monday morning, though the injury wasn't thought to be serious and might keep him out for a week.

"Whatever it was, it calmed down now," Mike Zimmer said after the game.

The right foot of Peterson was briefly stuck under the upper leg of Kyler Fackrell as the Packers linebacker brought him to the ground, slightly twisting the knee.

Sam Bradford is expected to start in Week 2 for the Minnesota Vikings.

Bradford took every first-team snap in practice this week, according to a league source, and he likely will replace supplant Shaun Hill.

The Vikings gave up a 2017 first-round pick and a conditional 2018 fourth-rounder for Bradford on Sept. 3 after Teddy Bridgewater tore multiple ligaments in his left knee on a non-contact play on Aug. 30.

"I thought Sam is a lot more comfortable with all the communication. I think he's getting more comfortable," offensive coordinator Norv Turner said Thursday. "The most important thing: He's getting comfortable with our players. Each guy is a little bit different, and I think you get reps with them, and you start getting more comfortable."

The Minnesota Vikings won't name a starting quarterback until Sunday, but Sam Bradford may have a greater chance to start than initially believed.

Minnesota traded a first-round pick to the Philadelphia Eagles for Bradford last weekend.

According to Vikings assistants, Bradford has been cramming to learn the club's offense and he's learning "extremely quickly."

"He's had to learn a number of offenses in the past few years, and he's picking it up extremely quickly," assistant coach Pat Shurmur said. "We're going to do things to help him, but for the most part, we've been very impressed with how far he's come in just a few days."

Teddy Bridgewater tore multiple ligaments in his dislocated knee, not just the ACL.

Bridgewater underwent surgery this week in Dallas.

Bridgewater is out for at least this season and the future of his career is in jeopardy.

Mike Zimmer says the Minnesota Vikings won't announce a starting quarterback until the hours leading up to Sunday's season opener.

Teddy Bridgewater is lost for the season with a torn ACL and dislocated knee.

The Vikings traded for Sam Bradford, but Shaun Hill is more comfortable with the team's offense.

Teddy Bridgewater will undergo surgery on Thursday to repair his torn ACL and other structural damage in his left knee.

The Minnesota Vikings at this time believe Bridgewater will eventually make a full recovery and resume his NFL career but more will be determined following the surgery.

Bridgewater suffered the season-ending injury without contact in a Vikings' practice last week.

The Vikings have since traded for Sam Bradford.