More often than not, the Ultimate Fighting Championship runs like a well-oiled machine without equal in the MMA rules world. Sometimes, however, all does not go according to promotional plan. Such is the volatile nature of a sport where the smallest mistake can change everything.

Plenty of fighters have ruined the UFC’s grand designs over the years. Perhaps that is part of the reason for UFC President Dana White’s baldness. No matter how perfectly someone sketches out something, monkey wrenches are everywhere in mixed martial arts.

The latest installment in the Sherdog Top 10 series examines the fighters and moments that have spoiled the UFC’s best-laid plans:

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HONORABLE MENTIONS: B.J. Penn draws Caol Uno (UFC 41), Clay Guida decisions Anthony Pettis (“The Ultimate Fighter 13” Finale), Joe Lauzon KOs Jens Pulver (UFC 63)

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