Floyd Mayweather is still keeping a close eye on the MMA world, especially when an old opponent competes. The former multiple-time boxing world champion put down $50,000 on Dustin Poirier to beat Conor McGregor in their highly-anticipated trilogy bout in the main event of Saturday’s UFC 264 in Las Vegas. And for Mayweather’s luck, Poirier came through defeating McGregor via TKO. The UFC star suffered a leg injury where he was deemed unfit to continue fighting .
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