UFC's Allan Nascimento. 34. dies of apparent heart attack

Field Level Media|published: 08/04/2026, 11:27am EDT

May 9, 2020; Jacksonville, Florida, USA; A general view of the empty octagon before UFC 249 at VyStar Veterans Memorial Arena. Mandatory Credit: Jasen Vinlove-Imagn Images

Flyweight Allan Nascimento has died of an apparent heart attack in his sleep, the UFC announced. He was 34.

"Despite the efforts of the responding medical team, he was pronounced deceased at the scene," UFC wrote Monday on X.

"Our thoughts and deepest condolences are with Allan's family, friends, teammates, and loved ones during this incredibly difficult time."

This morning, Monday, August 3rd, our beloved flyweight fighter, Allan Nascimento, was found unresponsive after suffering an apparent heart attack in his sleep. Despite the efforts of the responding medical team, he was pronounced deceased at the scene.

Our thoughts and deepest... pic.twitter.com/vlaBaBOyJr
— UFC (@ufc) August 3, 2026

Nascimento posted a 22-7 record (4-2 UFC) after making his professional debut in 2021. The Brazilian fighter saw his four-match winning streak come to a halt in a split-decision setback to Mitch Raposo on June 20 at UFC Fight Night.

--Field Level Media