The New Orleans Saints kicked off Week 6 with an upset of the previously undefeated Atlanta Falcons. It's just the latest result to shake up the NFL outlook in a season that's lacked much predictably outside of the New England Patriots' dominance.
Even if you look at the four unbeaten teams aside from the Pats, who are winning by an average of more than 18 points, their combined margin of victory is just a shade over nine points per game. So there's a lot of close games going on every week, and that's going to create a lot of drama as the year wears on.