Dustin Poirier cites brain scarring, behavior shifts in retirement

Dustin Poirier says brain scarring and behavioral changes were major factors in his decision to retire from mixed martial arts.

The former interim lightweight champion told MMA Mania that neurological damage contributed to his choice to walk away from competition. Poirier, who hung up his gloves earlier this year after losses to Islam Makhachev and Charles Oliveira, has been open about the toll fighting took on his health.

Poirier addresses recent arrest, health concerns

The revelation comes amid a turbulent stretch for the Louisiana native. Poirier was arrested at an airport in late June, an incident he addressed publicly last week. "I don't want to see it," he said of the bodycam footage from the arrest, per MMA Mania.

Poirier's retirement at 37 closed the book on a fifteen-year UFC run that included wins over Max Holloway, Justin Gaethje, and Conor McGregor. He never captured an undisputed championship despite five title fights spanning two weight classes.

Brain trauma remains a growing concern across combat sports. Multiple retired fighters have linked cognitive decline and mood disorders to accumulated damage from sparring and competition.

Original reporting:

• mmamania.com — Dustin Poirier reveals brain scarring, behavioral changes motivated UFC retirement | MMA Mania