The biggest conference championship upsets in NFL history

Nothing is guaranteed in the NFL — not even a trip to the Super Bowl. Here are the most shocking upsets in conference championship history.

January 20, 2008: New York Giants 23, Green Bay Packers 20 (OT)

(Jeff Hanisch-USA TODAY Sports)

The Giants under Tom Coughlin were able to beat the Patriots in two different Super Bowls despite seemingly overwhelming odds against them, and in both cases, the road to those Super Bowls carried them through conference championship games that went to overtime and were ultimately decided by Lawrence Tynes field goals. Tynes had missed a 36-yarder at the end of regulation, but in the first drive of overtime, Brett Favre threw a crushing interception to Giants cornerback Corey Webster, and Tynes made up for his previous miss with a 47-yard boot to send his team on. It was Favre’s lass pass for the Packers, while the Giants went on to shock the previously undefeated Patriots in the Super Bowl’s biggest upset.