20. Minnesota Vikings (1970)
The Vikings know more about choke-jobs than most NFL franchises because of their miserable history. They played the Chiefs in Super Bowl IV. This was the nearest they came to the Vince Lombardi Trophy. But in typical Vikings’ style, they blew it. Instead, Kansas City won their first Super Bowl at Tulane Stadium (via Bleacher Report).

A 13-point spread heavily favored the Vikings but they failed to live up to their promise. Instead, the Chiefs soared into a 16-0 lead in the second quarter. Furthermore, it was redemption for Len Dawson, who had a great game. In the end, it finished 23-7 as the Vikings went home with nothing. Sometimes the postseason throws up shocks but this was a big one.