Vikings quarterback Daunte Culpepper played Sunday's game at Cincinnati despite an injured right knee that has caused mild concern within the Vikings organization. Although Culpepper was not among the players the team acknowledged as injured Monday -- a list including receiver Nate Burleson, free safety Darren Sharper and linebacker E.J. Henderson -- he was seen wearing a tight elastic brace around the knee Sunday. The team has not revealed the exact nature of the injury, but coach Mike Tice alluded to it during his pregame radio interview Sunday on KFAN (1130-AM). Tice indicated the injury occurred during the season-opening loss to Tampa Bay. Culpepper was not listed on the injury report because the injury did not force him to miss any practice time, but it might have played a role in his decision to run only twice for 10 yards in the Vikings' 37-8 loss to the Bengals. Culpepper did not address the injury during an interview with reporters Monday. He suffered cartilage damage to his left knee during the first game of the 2001 season and eventually had season-ending surgery after 12 games.