The Carolina Panthers' overtime victory Monday night made it official: The NFL has four 7-0 teams for the first time in its history.
The league has had only one undefeated team in its modern era, of course: the 1972 Miami Dolphins. Odds are that all four of this year's candidates will trip at some point. How will it happen? Let's take a closer look at how each team got here and where it is most vulnerable.
(Teams are listed based on the likelihood they'll go 16-0 during the regular season based on ESPN's Football Power Index.