Minnesota Vikings linebacker Raonall Smith will miss at least two more games because of concussions.
Smith, who leads Minnesota with 12 special-teams tackles, missed last week's 31-28 loss to Indianapolis after his second concussion in two games.
He has complained of headaches since the second injury. He underwent tests with specialists Thursday in Pittsburgh and will be evaluated again Nov. 22.
The Vikings on Friday downgraded Smith from doubtful to out for Sunday's game at Green Bay. Randy Moss' status did not change -- the star receiver remained out with a hamstring injury.