9. Super Bowl XL
If there was a competition for the sketchiest single game in NFL history, then this would definitely be in contention. Super Bowl XL went down as an incredibly controversial occasion because of the number of dubious calls in favor of the Steelers. We don’t know what Mike Holmgren did to the referee before the game, but the officials had it out for the Seahawks.

There was the moment when they needlessly called Darrell Jackson for offensive pass interference after he fairly competed for the ball against Chris Hope (via Bleacher Report). One bad call is frustrating but several are infuriating. They awarded Ben Roethlisberger a touchdown even though his helmet crossed the line but not the ball. There were a few more decisions that caused Seahawks fans to gnash their teeth in rage.