This should be no surprise - for the past two years or so, Cain Velasquez has been the man to beat in the heavyweight division, and the toughest SOB out there. His cardio is second to none. His wrestling is dominant. And he does have a striking game. He took the belt from the beast, Brock Lesnar, in his first title reign, and smashed Antonio Silva's face to a bloody pulp when first they met. He avenged his loss to Junior Dos Santos by winning the belt back from him in solid fashion, then did it a second time for good measure. Overall, he's the toughest heavyweight the UFC has to offer, and if he defeats Werdum in November, the UFC will be hard pressed to find anyone - even the guys on this list - who can beat him.