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Over the years, we have seen our fair share of David beating Goliath.

Upsets are going to happen, and the best thing about them is they occur when you least expect it.

For the fan with no ties, these are some of the greatest moments in sports history. Even more so for the fans of some of these teams, as these are the events that they still live for to this very day.

For the fans of the team that was upset, some of these tragic events still haunt them, making them only wish to never have to experience something as upsetting as that ever again.

The following are the 50 greatest upsets in sports history.