Vikings: John Sullivan likely out for season after second surgery

Two weeks ago, John Sullivan was running and anticipated returning soon from back surgery. Now, it appears, the Vikings center might not play at all this season.

Coach Mike Zimmer said Monday that Sullivan, who already has missed six games since his September surgery, was injured in the weight room and required another procedure.

Zimmer said Sullivan's chance of returning this season is "minimal."

"He had a relapse about 10 days ago in the weight room, and so he had another procedure done on his back," Zimmer said. "So, we don't know when he'll be back or if he'll be back."

Zimmer also revealed that defensive tackle Sharrif Floyd recently had cartilage removed from his left ankle. Floyd, who…