In the wake of two embarrassingly lopsided losses, interim coach Leslie Frazier isn't giving up on Brett Favre and the Minnesota Vikings.

Frazier said he would not put Favre on season-ending injured reserve with a concussion and wouldn't rule out a return to the field before the season is over.

"He's proven time and time again that he's capable of coming back and playing," Frazier said yesterday.

Favre made a surprise start against Chicago on Monday night after being ruled out on Saturday with a sprained right throwing shoulder. He threw for 63 yards with one touchdown and an interception before getting knocked out of the game in the second quarter on a sack by Bears defensive end Corey Wootton.

Frazier said it was unlikely the 41-year-old quarterback could recover from the concussion in time to play Sunday at Philadelphia, but wouldn't rule out a return for the season finale at Detroit on Jan. 2.

Favre has said several times this will be his last season, and Frazier said the veteran doesn't want to go out watching from the bench.

"He doesn't want to let his teammates down," Frazier said. "He really wanted to play in front of the home fans last night for maybe the last time. That was important to him. I think more than anything he likes to compete and the fact that we've got two ballgames left, he's a guy who loves his teammates and loves to play. I think that's what motivates him more than anything."

If Favre cannot play, rookie Joe Webb will be the starter with recently signed veteran Patrick Ramsey as the backup. The Vikings were also considering signing Rhett Bomar off the Giants practice squad as insurance.