Dallas Cowboys – 2007
It’s almost a guarantee that the number one seed wins their opening postseason game. We say ‘almost’ because the Cowboys became the first-ranked team in 20 years to lose in the opening round. Shockingly, the 10-6 New York Giants stole a victory (via Bleacher Report).
This was crazy because the Cowboys were better in every aspect of the game. But they kept giving away penalties and the Giants made these count. Amazingly, the Cowboys crushed the Giants twice during the regular season. ‘Big Blue’ got its revenge in the New Year.