36. Aleksei Oleinik
Oleinik’s MMA career simply doesn’t make sense. The Russian UFC fighter is one of the oldest fighters on the promotion’s roster. At the age of 43, he was still the 10th-ranked heavyweight in the world. An elite grappler, Oleinik’s ability to overwhelm his opponents with technical BJJ makes him a bad match-up for many of the division’s sloppier fighters. In short, he can beat anybody on this day.
Incredibly, Oleinik made his MMA debut in 1996. To put this in perspective, that’s just three years after the UFC’s first event. Furthermore, it’s five years before the implementation of MMA’s unified rules. Somehow, ‘The Boa Constrictor’ continues to battle and defy his age. He has almost 80 fights on his professional record but shows no signs of wanting to slow down. But he’s so good, he doesn’t need to.