UFC flyweight Allan Nascimento dies at 34 after apparent heart attack
Allan Nascimento, a 34-year-old UFC flyweight, was found dead in his sleep from an apparent heart attack, the organization said.
Allan Nascimento, a 34-year-old Brazilian flyweight who competed in the UFC, died after an apparent heart attack while sleeping, the promotion announced on Monday. Emergency responders were unable to revive him at the scene.
The UFC expressed condolences to Nascimento’s family, friends, teammates and loved ones in a post on X.
Nascimento compiled a professional record of 22 wins and 7 losses, with 15 victories coming by submission. He made his UFC debut in 2021, losing a split decision to Tagir Ulanbekov, and then earned four consecutive wins over Jake Hadley, Carlos Hernandez, Jafel Filho and Cody Durden. He received Performance of the Night bonuses for his first-round rear-naked choke of Hernandez in January 2023 and a second-round anaconda choke of Durden in November 2025. His last fight on June 20, 2026, ended in a split-decision loss to Mitch Raposo.
Outside the Octagon, Nascimento fought on Brazil’s regional circuit and trained at the Chute Boxe Diego Lima gym alongside former UFC lightweight champion Charles Oliveira.