The Atlanta Falcons
The Falcons led at the end of the first quarter 20-0. By the half it was 29-10 in favor of the Falcons. And yet Atlanta lost in Week 2 by a final score of 40-39, an outcome highlighted by an absolutely abysmal handling of an onside kick in the final minute of the game that allowed the Cowboys to post 16 unanswered points in the final 5 minutes of the game.
How bad was this loss? Atlanta held a 99.9% odds to win the game with 3:09 left when they forced a Cowboys punt while leading 39-30. And, again, the Falcons lost.