The Detroit Lions are atop the NFL mountain. They’re tied for the best record in the NFL at 9-1, they’ve got a historically-high DVOA through 10 games, and they’re essentially the unanimous best team in the NFL according to Week 12 power rankings across the web.
But there is no such thing as an unbeatable team. The 2007 undefeated New England Patriots lost to the Giants in the Super Bowl. The Kansas City Chiefs, for all of their greatness over the past few years, have lost an average of 4.