The NFL underdog index: which teams could spring a Super Bowl surprise?

The Kansas City Chiefs are tipped to retain their title. But there are teams on the outside who could still mount a challenge

The playoffs are swiftly coming into view and the favourites to lift the Lombardi Trophy are clear but let's not be too hasty in crowning Kansas City, Pittsburgh or New Orleans just yet. The postseason's expansion to 14 teams increases the pack of outsiders and the chance of an outtsider fighting all the way to February. Here are the best of the underdogs (plus a team from the NFC East) who can cap a season defined by Covid-19 with a more uplifting conclusion.