Next week’s UFC 264 headliner features two of the biggest stars in the sport. Conor McGregor , it could be argued, is the biggest star in MMA history. And Dustin Poirier has gone from contender to champ-level to must-see TV, himself. These days, McGregor is known as one of the brashest talkers in the game – a larger-than-life persona who also happens to be one of the world’s wealthiest athletes
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