Allan Nascimento, a Brazilian UFC flyweight fighter, died at age 34 after suffering an apparent heart attack in his sleep on Monday morning, August 3, 2026 [1, 2, 3, 4, 5]. Nascimento was found unresponsive and pronounced dead at the scene despite medical efforts. The UFC said, "Despite the efforts of the responding medical team, he was pronounced deceased at the scene" [3].
Nascimento held a professional MMA record of 22 wins and 7 losses overall, with a UFC record of 4 wins and 2 losses [1, 2, 3, 4]. He debuted in the UFC in 2021 and last fought on June 20, 2026, losing by split decision to Mitch Raposo [1, 3, 4].
He trained out of the Chute Boxe team under head coach Diego Lima [4]. Known by his nickname "Puro Osso" (All Bones) due to his lean physique as a teenager, Nascimento was well regarded in the flyweight division [4].
The UFC expressed its condolences, saying, "Our thoughts and deepest condolences are with Allan's family, friends, teammates and loved ones during this incredibly difficult time" [1].
The next major fight for the UFC flyweight division will proceed with the absence of Nascimento, following his death on August 3.
