1 Atlanta Falcons blowing a 25-point lead (Super Bowl LI: Atlanta Falcons vs. New England Patriots)
Atlanta was beating New England by 25 points halfway through the 3rd quarter. But The Patriots came back and won it in overtime.
2 Bills' kicker Scott Norwood missing the game-winning field goal (Super Bowl XXV: Buffalo Bills vs. New York Giants)
All Norwood had to do was kick the field goal and the Bills win.
3 Russell Wilson throws an interception at the one-yard line (Super Bowl XLIX: New England Patriots vs. Seattle Seahawks)
Worst play call in NFL history, hands down.
4 Cowboys' tight end Jackie Smith drops wide-open touchdown pass (Super Bowl XIII: Pittsburgh Steelers vs. Dallas Cowboys)
Roger Staubach found Jackie Smith wide open in the endzone, but Jackie dropped it, ultimately leading to the Steelers winning.
5 Carolina kicker John Kasay botched kickoff (Super Bowl XXXVIII: Carolina Panthers vs. New England Patriots)
The kickoff went out of bounds, giving Brady a short field, which ultimately lead to Adam Vinateri kicking the game-winner
6 Patriots' wide receiver Wes Welker dropped pass (Super Bowl XLVI: New York Giants vs. New England Patriots)
New England was trailing the Giants in the Super Bowl. Suddenly, Brady found Wes Welker wide open, but he dropped the pass. The Giants won the game.
7 Cowboys's defensive lineman Leon Lett's premature celebration (Super Bowl XXVII: Buffalo Bills vs. Dallas Cowboys)
Dallas won the game but still... Leon Lett picked up a fumble and he looked like he was about to score, but he celebrated too early and the ball was knocked away.
8 Panthers' quarterback Cam Newton backs away from recovering a fumble (Super Bowl 50: Denver Broncos vs. Carolina Panthers)
We all saw it. Cam Newton fumbled the ball. Instead of diving on it, he backed away to "prevent getting injured"
9 Bears' quarterback Rex Grossman falls down (Super Bowl XLI: Indianapolis Colts vs. Chicago Bears)
Rex Grossman fumbled the snap and fell down trying to recover it.
10 Tom Brady fumbles with 2 minutes remaining (Super Bowl LII: Philadelphia Eagles vs. New England Patriots)
The Contenders
11 Baltimore Colts self-destruct (Super Bowl III: Baltimore Colts vs. New York Jets)
The Colts simply sucked in this game.
12 Cowboys' wide receiver Billy Joe Dupree falls down (Super Bowl XII: Dallas Cowboys vs. Denver Broncos)
I know the Cowboys won but still...