John Sullivan played every snap and should have gone to the Pro Bowl in his fifth NFL season. He'll miss some work in the offseason, though.

The Minnesota Vikings' standout center underwent microfracture surgery on his left knee last week, according to two NFL sources.

Sullivan, 27, had the surgery on Thursday at Dr. James Andrews' office in Pensacola, Fla. He is facing a three- to four-month rehabilitation -- likely sidelining him for a good chunk of the Vikings' offseason program, which culminates with the mandatory minicamp in mid-June.

Microfracture surgery treats damaged areas of articular cartilage by creating small fractures in the bone underneath. The good news is Sullivan's lesion was small, sources said, and he should make a full recovery before training camp begins in late July.