UFC Fighter's Sudden Passing
UFC Mourns Allan Nascimento, 34, After Apparent Heart Attack in Sleep
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Key Points
1
Nascimento had 29 professional bouts in his career, according to reports referencing his lengthy tenure before UFC.
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During his UFC tenure, he earned two Performance of the Night bonuses.
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Nascimento's last UFC fight was a split-decision loss to Mitch Raposo in Las Vegas in June.
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In UFC competition, 16 of his 22 wins came by submission, underscoring his Brazilian jiu-jitsu background (he was a BJJ black belt).
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Nascimento was born in São Paulo, Brazil, and built his career there before joining the UFC in 2021.
UFC flyweight Allan Nascimento died at age 34 after suffering an apparent heart attack in his sleep, the UFC confirmed on Monday, August 3, according to Al Jazeera. The Brazilian fighter, known by his nickname Puro Osso, was training with the Chute Boxe Diego Lima gym in São Paulo at the time of his death.
Nascimento finished his professional career with a 22-7 record across 29 bouts, including six fights in the UFC. He earned two Performance of the Night bonuses during his UFC run, according to Marca.
A Career Built on Submissions and Grit
Nascimento turned pro in 2011 and spent a decade grinding through combat sports before the UFC came calling in 2021. He was a Brazilian jiu-jitsu black belt, and it showed. Sixteen of his 22 career wins came by submission, per Marca.
He went 4-2 inside the UFC octagon. His last fight was a split-decision loss to Mitch Raposo in Las Vegas in June. Despite that setback, Nascimento had already cemented a reputation as a dangerous, technically skilled fighter in one of MMA's deepest divisions.
Teammates and Fighters Pay Tribute to Puro Osso
Nascimento trained alongside former UFC lightweight champion Charles Oliveira at Chute Boxe Diego Lima. Oliveira posted a tribute after news broke, calling Nascimento's passing a devastating loss. Other fighters quickly shared messages of respect and grief.
Former NFL quarterback Robert Griffin III also sent his condolences. Griffin posted on X to share his "thoughts and prayers" with Nascimento's family and teammates, according to Yahoo Sports.
Heart Attacks in Young Athletes Raise Alarm
Nascimento's death has renewed concern about cardiovascular health in combat sports. Heart-related events among younger athletes have been rising, and his case is one of the most high-profile examples in MMA in recent years, according to Newsy Today.
At just 34 and still actively training, Nascimento showed no public signs of illness. His death in his sleep underscores how sudden and unpredictable cardiac events can be, even in elite, physically conditioned athletes.
UFC Mourns the Loss of a São Paulo-Born Fighter
The UFC released an official statement confirming Nascimento's passing and offering condolences to his family, according to Al Jazeera. The organization did not release details about a cause beyond the apparent heart attack.
Born and raised in São Paulo, Nascimento built his entire career in Brazil before breaking into the world's top MMA promotion at age 31. He leaves behind a legacy of toughness and a fight style that was uniquely his own.
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