#2 Conor McGregor
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It is probably safe to say that Conor McGregor is a one-of-a-kind athlete and fighter for this generation. In just a matter of four years, he was able to go from obscurity and collecting social welfare checks to becoming a prominent figure that transcends all forms of prizefighting.
Hating on "The Notorious" because of his bravado and trash-talking skills is a given, but most fans have begun to grow tired of his schtick, mainly because of his absence in the UFC. After fighting Floyd Mayweather in a boxing match last August, McGregor has yet to fulfill his obligations as the UFC lightweight champion since winning the belt in 2016.
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UFC president Dana White recently revealed that McGregor would likely be stripped of the title for failing to defend it, and if you ask either Tony Ferguson, Khabib Nurmagomedov, or the droves of fans who want to see an active lightweight champion, it is indeed some refreshing news to hear.