5. Anderson Silva (2013)
Silva was electrifying in the UFC middleweight division. It appeared as though nobody could touch him, let alone beat him. His-16 fight unbeaten streak was the longest in UFC history and he defended his title a remarkable 10 times. But then he met Chris Weidman. The New Yorker stunned the world because he knocked Silva out. However, the promotion granted the Brazilian a rematch because he felt like he didn’t take the fight seriously.

Unfortunately, Silva lost the rematch in an even more brutal manner. He kicked Weidman’s leg and snapped his own leg in the process. It was one of the most horrifying injuries in the history of the sport because his leg bent at a gruesome angle. Many fans didn’t expect Silva to return after this career-threatening broken leg. But he rehabbed his injury and continued to fight. Ultimately, however, he was never the same again.