No. 4 -- Vitor Belfort
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Belfort is one of those guys who's grown more fervent over the years, with a self-belief system that's in constant collusion with our celestial governors. So it's no surprise he answered the call to fight Jon Jones on a few weeks' notice. The "old lion" has been at it for 15 years, and has so much belief in his ability, so much confidence in his hands, that it doesn't matter to him the particulars. Just tell him when and where, and he'll be there.