Dustin Poirier

Dustin 'The Diamond' Poirier retired in 2025 as a beloved UFC lightweight legend, a former interim champion who twice defeated Conor McGregor.

Dustin Poirier won the interim UFC Lightweight Championship in 2019, knocked out Conor McGregor twice across their trilogy, and tied the record for most finishes in UFC lightweight history — building a case as the finest fighter never to hold undisputed gold at 155 pounds across a 17-year professional career. Poirier, nicknamed "The Diamond," won the interim UFC Lightweight Championship in 2019, defeating Max Holloway, before challenging for the undisputed title three times across his career, including a widely praised trilogy of fights against Conor McGregor between 2014 and 2021, in which Poirier won the final two meetings. Poirier is tied with McGregor for the record of most finishes in UFC lightweight history, and became one of the most respected voices in the sport for his sportsmanship, donating extensively to charitable causes through The Good Fight Foundation, established with his wife, Jolie. Poirier retired from professional competition in 2025 after a 17-year career, closing out one of the most consistently entertaining and hard-fought resumes in UFC history, having never held undisputed gold despite being widely regarded as one of the finest lightweights never to do so.

Poirier is known for his exceptional boxing skills, particularly his left hook and uppercut combinations. He combines technical striking with excellent cardio and mental toughness, often finding success in later rounds when opponents fade.

Poirier has helped elevate the popularity of MMA in Louisiana and is respected for his warrior mentality and sportsmanship.

• Interim UFC Lightweight Champion 2019
• three-time undisputed UFC Lightweight title challenger
• two career wins over Conor McGregor