Vikings running back Adrian Peterson did not practice yesterday and his status for Sunday is uncertain.

"He's doing better," Vikings coach Leslie Frazier said yesterday morning. "It's going to be a day-to-day deal with him and may even go right down until gametime. He's making progress. That thigh [contusion] has been real sore."

Peterson, who also has had knee and ankle trouble, was a surprising deactivation shortly before kickoff of the Vikings loss to the Bears on Monday night.

Much like the rest of the 5-9 Vikings, Peterson has had a subpar season. He's eighth in the NFL with 1,149 rushing yards, but he's had just one 100-yard game in the Vikes' last seven.

Frazier said weather will not be a factor in the decision to play Peterson Sunday night against the Eagles. Temperatures at Lincoln Financial Field are expected to be in the 20s with possible snow.

"It'll just be a matter of whether he can go or not," the coach said. "If he could have [played] Monday night, the conditions wouldn't have mattered. If he can go, he'll go."

Also, the Vikings signed quarterback Rhett Bomar off the Giants' practice squad on Tuesday. Frazier is preparing rookie Joe Webb to make his first career start. Patrick Ramsey would be the backup and Bomar would serve as the No. 3. In this scenario, Brett Favre would be deactivated. Favre, who made a surprise start on Monday before getting knocked out of the game, is sidelined until he can pass concussion tests.

Favre's weekly news conference in Minnesota was canceled yesterday.

"It will just be a day-to-day situation," Frazier said. "If he gets cleared by our doctors, then things will change. But until he is cleared, there isn't much that can be done, other than what the doctors recommend."

Madieu Williams, who has had his adventures as the starting free safety, also did not practice yesterday. He, too, sustained a concussion on Monday, when he took a knee to the head from Chicago running back Matt Forte.