Max Holloway retained the symbolic BMF title as Dustin Poirier's esteemed career ended in defeat at UFC 318 in New Orleans, Louisiana.
Holloway's volume of strikes helped him win an entertaining contest by unanimous decision as he became the first fighter to defend the belt awarded to the UFC's "baddest".
Afterwards Holloway called out lightweight champion Ilia Topuria before paying tribute to fellow American Poirier.
"I've got some history with the champ. UFC, it's your move next, baby, but I'm done talking," said Holloway.
"This is Dustin's retirement fight - give it up to my man."
Former interim lightweight champion Poirier, 36, retires as one of the most respected athletes to step foot inside the octagon.
After making his UFC debut in 2011, Poirier won 22 of 32 fights and retires as arguably the best fighter to never win an undisputed title.
"I'm grateful for this experience and journey. I want to thank (UFC president) Dana White and the UFC for giving a kid a platform to make something of his life, to help keep my family is a safe place," said an emotional Poirier.
