Power Rankings: No. 21 Buffalo Bills

A weekly examination of the Bills' ESPN.com Power Ranking:

Preseason: 30 | Last Week: 25 | ESPN.com Power Ranking since 2002

And back up they go.

After taking down a division opponent on the road, the Buffalo Bills have reached new heights in the ESPN.com Power Rankings, landing at No. 21 this week. The Dolphins, who entered the game at No. 14, slipped to No. 16.

One voter -- ESPN national NFL writer Kevin Seifert -- slotted the Bills at No. 17 this week. That's just a few spots out of the theoretical playoff threshold, a sign that the 3-4 Bills very much remain on the radar outside of Buffalo.

Their next challenge, though, will probably be their toughest of the season. They travel to New Orleans to try to take down the No. 5 Saints.

Can they pull it off?