The two lightweights had a rematch five years after their first meeting, which Poirier won by fourth-round TKO. This time, it was Gaethje who got the better of the exchanges, landing a number of heavy shots in the first round.
In the second round, Gaethje landed a perfect head kick that sent Poirier to the canvas. Poirier tried to get back to his feet, but Gaethje swarmed him with punches and the referee stopped the fight at the 1:00 mark.
With the win, Gaethje becomes the first fighter to win the BMF title twice. He also moves to 25-4 overall and 6-3 in the UFC. Poirier falls to 28-7 overall and 19-6 in the UFC.
In the co-main event, Alex Pereira defeated Jan Blachowicz by split decision to win his light heavyweight debut. Pereira, a former middleweight champion, knocked Blachowicz down in the first round, but Blachowicz rallied in the second and third rounds.
The judges scored the fight 29-28, 28-29, and 29-28 for Pereira. With the win, Pereira moves to 5-1 overall and 2-0 in the UFC. Blachowicz falls to 29-9 overall and 16-5 in the UFC.