UFC 257 is less than three weeks away, and the UFC is shifting into full-on promotion mode. The third event of a three-cards-in-10-days return to “Fight Island,” the Jan. 23 pay-per-view is headlined by a rematch between Conor McGregor and Dustin Poirier . On Monday, UFC president Dana White released a new promotional video hyping the rematch on his social media channels
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