MINNEAPOLIS — Minnesota Vikings center John Sullivan is listed as probable for the game at Tampa Bay on Sunday after suffering a concussion last week.

Sullivan was a full participant in practice on Friday. He left the loss at Buffalo last week with a concussion, which he says is at least the fifth of his career. He says he took a knee to the helmet, but thought he felt good enough to return to the game before being overruled by the team’s medical staff.

Cornerback Josh Robinson is questionable with an ankle injury and guard Vladimir Ducasse is questionable with a knee injury. Robinson did not practice on Friday, an ominous sign for his chances to play.

Veteran backup Joe Berger could fill in at guard for Ducasse.