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Dustin Poirier Knocks Out Conor McGregor at UFC 257

Dustin Poirier punches Conor McGregor on UFC Fight Island on Jan. 23. 

Dustin Poirier punches Conor McGregor on UFC Fight Island on Jan. 23. 

Photographer: Jeff Bottari/Zuffa LLC/Getty Images

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Abu Dhabi, United Arab Emirates (AP) -- Dustin Poirier stopped Conor McGregor with a flurry of punches midway through the second round Sunday, avenging his loss to the Irish superstar with a knockout victory at UFC 257.

Poirier (26-7) caught McGregor with a series of shots to the head before buckling his knees with two left hands. Poirier then sent McGregor to the canvas with a short right hand and finished it at 2:32 of the second, setting off stunned excitement among the few thousand screaming fans allowed inside the Etihad Arena on Yas Island.