UFC Fighter Allan Nascimento Dies at 34 After Reported Heart Attack

Brazilian UFC flyweight Allan “Puro Osso” Nascimento has died at age 34 after reportedly suffering a heart attack. The Brazilian fighter was found unresponsive on August 3, and the UFC said emergency responders pronounced him dead at the scene. Nascimento leaves behind a 27-7 professional MMA record and a lasting legacy within his team.

Key takeaways

• Allan Nascimento died at 34 after a reported heart attack.
• The Brazilian flyweight finished his career with a 27-7 record, including a 4-2 mark in the UFC.
• His final bout was a split-decision loss to Mitch Raposo on June 20, 2026.
• Teammates and fellow fighters remembered him as a dedicated competitor, mentor, and friend.

A career built through perseverance

Nascimento, who was born in São Paulo, began training in 2007 after taking up Muay Thai. He said he was a small, skinny teenager when he first entered a gym, where teammates gave him the nickname “Puro Osso,” Portuguese for “pure bone” or “skin and bones.” The name followed him throughout his career.

He gained wider attention in 2018 after appearing on Dana White’s Contender Series. Nascimento eventually reached the UFC, compiling four victories and two defeats in the organization. His final appearance came at UFC Fight Night on June 20, 2026, when he lost a closely contested split decision to Raposo.

A fighter remembered beyond the cage

In a statement, the UFC expressed its condolences to Nascimento’s family, friends, teammates, and loved ones. His Chute Boxe team also paid tribute, describing him as more than an athlete and honoring his character, work ethic, and commitment to competition.

Nascimento had spoken about the importance of his family’s support despite their initial concerns about combat sports. His father died before his UFC debut, but Nascimento said he continued to feel his presence and carried a photograph of him to fights.

Tributes from the MMA community

Former UFC lightweight champion Charles Oliveira, who had trained and worked with Nascimento, described the fighter as a brother given to him by the sport. Oliveira recalled their time sharing training sessions, working corners, and spending time together outside the gym.

Nascimento had been scheduled to serve as a guest coach at The Charles Oliveira Experience in Lynchburg, Virginia, on August 9. His death came just weeks after his most recent UFC fight and before that planned appearance, adding to the sense of loss felt by those who knew him.

Nascimento’s career was defined not only by his professional record, but also by the relationships he formed in Brazilian MMA. Teammates and peers remembered a disciplined fighter whose presence extended well beyond competition.