Dustin Poirier appeared on the Diary of a CEO podcast with Steven Bartlett on July 6 and delivered the most candid account of his UFC retirement to date, revealing brain scan results that showed structural damage from years of head trauma, the fallout from his June arrest, and the specific conditions under which he would consider fighting again.

What Did Dustin Poirier Reveal About His Brain Scan Results?

The medical findings Poirier described are serious. A neurologist who examined him found scarring in his brain, thinning in the posterior region, and separation of the septum, the membrane that divides the left and right hemispheres. According to the neurologist, that separation can impair communication between the two sides of the brain, a likely consequence of accumulated head trauma across more than a decade of professional fighting at the highest level.

Poirier was careful and precise about what those results do and do not mean. He noted that CTE cannot be confirmed while a person is alive: “It has to be posthumous. You can’t…we won’t know until I pass away.” That clarification does not soften the weight of what is already confirmed. The structural damage is documented. Whether it progresses is an open question he will live with.

His wife had seen the signs before the scan. She noticed behavioral changes in him years earlier, including mood fluctuations and impulsive decision-making, and she expressed concern at the time. “She was kind of worried about my behavior a few years back,” Poirier said. Those observations, combined with what the brain scan confirmed, were central to his decision to walk away from competition when he did. He fought Max Holloway for the final time at UFC 318 in New Orleans on July 19, 2025, losing by unanimous decision in his announced retirement bout.

The interview also put the full picture around his June 21 arrest at Hartsfield-Jackson Atlanta International Airport into focus. Poirier had been drinking champagne on his flight to Atlanta and continued during his layover. When gate agents denied him boarding on a Delta flight to Fort Lauderdale, he became agitated, confronted staff, and took an aggressive posture toward responding officers before being handcuffed and charged with misdemeanor public intoxication.

He connected the incident directly to Father’s Day, to his estranged father’s ongoing homelessness and history with alcohol, and to the depression that has been a recurring presence since his retirement. “Alcohol has never benefited me, especially in times where I’m mentally not the best,” he said. He apologized to the airport employees and officers involved and asked for the responding officer’s contact information to reach out personally.

The professional fallout arrived quickly. At least one major sponsor ended its relationship with him after the arrest, and his role as an analyst on Paramount+ is reportedly in jeopardy. He did not dodge any of it: “One big sponsor isn’t a sponsor anymore. I’m losing sponsors. I’m losing gigs.”

What Does Poirier’s Retirement Reveal Mean for the UFC Lightweight Division?

Poirier retired at 30-10-0 as one of the most accomplished lightweights in UFC history. He held the interim UFC Lightweight Championship, has significant wins over multiple former champions and contenders, and was a main event draw for years. His departure from competition in July 2025 was already one of the bigger losses the 155-pound division absorbed in recent memory.

The division now belongs to Justin Gaethje, who stopped Ilia Topuria to claim the undisputed lightweight title at the White House event on June 14. Gaethje and Poirier have met twice, with the series tied 1-1 and both fights ending by knockout. That unfinished business is legitimate, not manufactured for a card.

If Poirier were to return, even at the five-percent odds he attached to the idea, the impact on the division would be immediate. A Gaethje trilogy would be one of the most anticipated matchups at 155, regardless of title implications. Two knockout finishes in two meetings, and a rivalry with no clear resolution, is the kind of thing the division does not have an abundance of right now.

What’s Next for Dustin Poirier?

Poirier is still under UFC contract. He named three opponents who could pull him back: Conor McGregor, Nate Diaz, and Justin Gaethje. His words on the Gaethje situation carried the most conviction: “Me and Gaethje are 1-1. That needs closure too.”

The McGregor option is a commercial argument more than a sporting one, but that does not make it irrelevant to how the UFC operates. Poirier leads their head-to-head 2-1 and a fourth fight between them would be a pay-per-view event regardless of context. A Nate Diaz fight would be a similar draw, built on years of shared history in the same weight class.

For now, Poirier is focused on rebuilding outside the cage. He spoke about struggling with the identity shift that comes after two decades of competitive fighting. “I was scared for the future. Twenty years, I was dreaming about being the best. I just want to dream again.”

At 37, with brain scans showing structural damage, that is a line that reads differently than it would coming from someone who stepped away unscathed. Whether he fights again is secondary to whether he finds that new direction. The interview made clear he is still very much looking for it.

What do you think Poirier’s next move should be? Drop it in the comments below. For premium UFC picks, visit BetMMA.tips/DelinquentMMA.