EDEN PRAIRIE, Minn. — The Minnesota Vikings are preparing this week as if Brett Favre won't be able to start because of a concussion that knocked him out of the last game.

Interim coach Leslie Frazier says Favre's status will be day to day. He'll take daily tests until he's cleared by the team's medical staff. Until then, he won't be allowed to take the field.

The Vikings have two games left. Favre has said this will be his final season.

Frazier says the plan is to have rookie Joe Webb start Sunday against the Philadelphia Eagles unless Favre's condition improves.

Favre was not made available to the media Wednesday, when he usually holds his weekly news conference between games.