NFL Teams That Will Never Live Down Their Embarrassing Mistakes
Marshall Goes The Wrong Way

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There are a lot of embarrassing things that can happen at a sports event. Running in the opposite direction is certainly near the top of that list. Jim Marshall was a defensive end for the Vikings at the time of the event.
He picked up the ball after a fumble and ran it 66-yards. The only thing was he ran it back to the wrong end zone. The only bright side to this is that the Vikings won the game. He still handed the opposition two points by doing it.