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Perfection is a term rarely used when discussing athletic competition. But over the course of history, it's become clear that imperfections are the building blocks that hoist success.

Underneath the brilliant highlight reels and jaw-dropping finishes is a collection of forgettable performances that have simultaneously defined careers and tarnished franchises.

Let's take a look at the 50 worst screw-ups in sports history, those that were immediately cemented in the legendary record books of mediocrity.

Some were reckless, others misguided, all legendary.

Legacies were scripted one mistake at a time.