NEW ORLEANS - JANUARY 24: John Sullivan #65 of the Minnesota Vikings runs blocks against Jonathan Vilma #51 of the New Orleans Saints during the NFC Championship Game at the Louisiana Superdome on January 24, 2010 in New Orleans, Louisiana. (Photo by Jed Jacobsohn/Getty Images)
Minnesota Vikings center John Sullivan had microfracture surgery on his left knee last week and he should be fully recovered and back by training camp, according to a team source via Mark Craig of the Star Tribune.
Sullivan played every offensive snap in 2012 but battled knee pain throughout. The surgery was performed Dr. James Andrews, who also fixed up Adrian Peterson's knee last year.
With the timetable for recovery at three to four months, if all goes well, Sullivan will be ready later July.
He was selected to the Pro Bowl as an alternate, earning seven first-team All-Pro votes.