MMA legend BJ Penn has nothing else to prove in the sport of mixed martial arts.  He's fought and defeated legends of the sport.  In a recent interview on the MMA Hour with Ariel Helwani he was asked why he decided to come back to the sport,  his answer was classic BJ Penn:

"If I cared about legacy I would have never fought all those guys... I would have never took all these fights.  I think they're confusing me with someone who actually cares. I don't care about that stuff. I JUST WANT TO SCRAP!"

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