3. Demetrious Johnson
Perhaps the most complete fighter to ever compete inside the Octagon, “Mighty Mouse” remains the only flyweight champion in UFC history. The AMC Pankration representative has gone 11-1 -- his only loss came to Dominick Cruz at 135 pounds -- in Ultimate Fighting Championship title fights and shows no signs of slowing down. Johnson, 31, captured the inaugural flyweight championship with a split decision over Joseph Benavidez at UFC 152 in September 2012 and has only tightened his stranglehold on the division since. Wins over Benavidez, John Dodson (twice), Kyoji Horiguchi and 2008 Olympic gold medalist Henry Cejudo have highlighted his reign at 125 pounds.
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