10 Toughest UFC Heavyweights Active Today

2. Junior Dos Santos

http://www.youtube.com/watch?v=fuoAv7ueix8 Arguably the best boxer in MMA, and definitely in the heavyweight division, Junior Dos Santos has fought Cain Velasquez three times, winning once by knockout to win the heavyweight championship, and losing twice - once by decision in a lopsided beating that left his face look something like a rotten tomato, and once by TKO - in the fourth round of a fight that looked an awful lot like their first meeting. The fact that he takes these drubbings and keeps coming back for more, and beats everyone besides Cain Velasquez in the process, should tell you how tough JDS is. He also happens to be a super nice guy, which makes you root for him even more, and adds to the sting of his losses a little - especially when they're the sort of losses that can take a few years off your life (or off those years that you have with a decent quality of life). His wins are just as spectacular as his losses, however, usually brutal, swift knockouts that end up on highlight reels, like his uppercut crushing of Fabricio Werdum, his decimation of Frank Mir, or his spinning back kick destruction of Mark Hunt, a move that no one saw coming.