Minneapolis Star Tribune "Vikings center John Sullivan had back surgery Wednesday, and the team placed him on injured reserve/designated to return this morning. Under that one-time designation, he must sit out a minimum of eight weeks. Sullivan, in his eighth season out of Notre Dame, sat out practices and preseason..." September 10
Minneapolis Star Tribune "Vikings defensive back Josh Robinson will be out at least 4-6 weeks because of a fractured sternum he suffered in Sunday's loss against the Seahawks, Vikings head coach Leslie Frazier announced during Monday's press conference. Frazier did not say whether they would place Robinson on injured..." November 18
Fox Sports North "A welcome sight as the Minnesota Vikings began training camp practices Friday was the lack of players relegated to the sidelines in particular starting center John Sullivan who missed the team's offseason workouts because he was recovering from microfracture surgery on his left knee. Sullivan..." July 27
Center John Sullivan (knee) also is "on target to start when we start, so hopefully, that’ll still be the case."
ESPN 1500 Twin Cities "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..." February 06