Conor McGregor

Considering that MMA or Mixed Martial Arts is considered quite a new professional sport having its very first event in 1993, it has grown with incredible speed. Conor McGregor began his career in MMA in 2008 and has made a name for himself, almost unrivaled by any other fighter in the octagon. He earned $99 million in a span of 1 year alone, $85 million of that was made during his historic boxing match against Mayweather. And just like he said himself, he may have lost the match, but he sure hasn’t lost the battle.