After waiting eight weeks to get a victory, the Vikings finally broke through this afternoon scoring a 33-26 road win over the Redskins. But you can bet they'd trade that triumph back if they didn't have to deal with the latest bad news: Adrian Peterson has torn the anterior cruciate ligament in his left knee.

Team officials have confirmed tonight that an MRI taken on Peterson's knee has revealed the ACL tear, an injury the star running back suffered on the first play of the second half when he was hit by Washington safety DeJon Gomes. Peterson's left leg was planted at the time Gomes drove into his leg, causing the knee to bend at an awkward angle.

There is additional fear that Peterson may have also damaged the medial collateral ligament in his knee, something the team has yet to confirm. Head coach Leslie Frazier will next meet with the media Monday afternoon where a further update on Peterson's status will be available.

At present, the Vikings are left to process the possibility of Peterson being out for an extended period of time. Depending on the severity of the injury, Peterson's rehabilitation timetable could extend into the 2012 season. He finished this season with 208 carries for 970 yards, marking the first time in five seasons that he didn't reach the 1,000-yard milestone.

But once again, that's a trivial statisical footnote to a dose of horrible news for Peterson and the Vikings, who are now left to deal with the anxiety of an uncertain future.