5 unbreakable UFC chins that finally broke

#2. Tony Ferguson

Tony Ferguson is many things. He is a former UFC interim lightweight champion, the owner of the longest lightweight win streak, the TUF 13 winner, and he once possessed one of the greatest chins in the UFC.

While Ferguson's chin was classically tough, it did not always prevent him from suffering knockdowns or being badly rocked. However, its defining feature was enabling him to recover from fight-ending sequences with alarming quickness.

Powerful fighters like Edson Barboza, Rafael dos Anjos, Kevin Lee, Anthony Pettis, and Michael Johnson were all unable to knock Ferguson unconscious. Even Justin Gaethje, arguably the most powerful puncher in the lightweight division, could not knock Ferguson out despite walking his foe into crushing counterpunches for five rounds before referee Herb Dean ended the bout.

Ferguson's chin seemed to have no limit, with Gaethje's TKO victory coming only after Herb Dean had seen enough and opted to spare Ferguson any more punishment.

Yet, 'El Cucuy' remained conscious. While Ferguson lost his next two fights, they were all decision losses in largely grappling affairs. When he crossed paths with Michael Chandler, however, Ferguson encountered an unstoppable force, suffering a brutal front-kick knockout loss early in the second round.

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#1. Dan Henderson

Retired MMA legend Dan Henderson was both an unstoppable force and an immovable object. The vicious knockout power he possessed was enough to flatten any foe he faced, while his otherworldly toughness enabled him to walk through any strikes his opponents dared throw his way.

No one could survive Henderson's overhand right nor could anyone knock Henderson unconscious.

The incredibly powerful Wanderlei Silva twice fought Henderson, failing both times to crack the American's chin. The similarly powerful Quinton 'Rampage' Jackson was not able to do so either.

In Henderson's first matchup with Vitor Belfort, the powerful and explosive Brazilian found himself unable to knock his foe out like he'd done to so many others in the past. Even master counter-strikers with deceptive knockout power like Anderson Silva and Lyoto Machida couldn't dent his chin.

They were not the only ones to try as even heavyweight legend Fedor Emelianenko and powerful punchers Mauricio 'Shogun' Rua and Rashad Evans failed.

However, after 39 fights, Henderson's chin finally collapsed. It did so against Vitor Belfort in a rematch between the pair. After the first knockout loss of his career, Henderson, who was once impossible to knock out, went on to be knocked out twice more in the last seven bouts of his career before finally retiring.