The X Greatest Super Bowl Upsets of All-Time

With about 24 hours 'til the kickoff of 'Super Bowl Sunday' between the Pittsburgh Steelers and the Green Bay Packers tomorrow, this year's contest has all the makings of a true classic. Both teams are among the oldest – and winningest – franchises in the history of the NFL. They've got potent offenses and stringent defenses. Their fan bases are notorious and passionate, each with signature paraphernalia. Unless either team wins by more than two touchdowns, history will look back on this game kindly.

However, I think it's the upsets that draw the greatest intrigue among casual and die-hard fans because they have much more taglines and stories to tell beyond the final score. And besides, who doesn't love an underdog winning it all with more skeptics than believers heading into the big game? As such, here are what I consider to be the ten greatest Super Bowl upsets of all-time. Number one may surprise you.