The victory gives Poirier a bounce-back win in his return fight from his third-round submission loss to Khabib Nurmagomedov at UFC 242 in September.
Mike Perry turned in a peak performance, Maurice Greene pulled off a unique submission win, and Takashi Sato scored an impressively quick knockout.
While both of these fighters are known for their grappling and submission skills, Allen made the first impactful move in the fight when he dropped Daukaus with a huge knee.
Takashi Sato wasted no time earning his second UFC win, dispatching of Jason Witt in just 48 seconds.
The second UFC fight for undefeated Sean Woodson was supposed to be another spotlight moment for the featherweight.