UFC fighter, 34, found dead after ‘apparent heart attack’ in his sleep

UFC fighter Allan Nascimento, 34, has died after suffering an 'apparent heart attack' in his sleep, according to a statement from the Ultimate Fighting Championship (UFC). The incident occurred on Monday, August 3rd, 2026, in Las Vegas.

UFC Mourns the Loss of Flyweight Fighter

The UFC released a statement confirming the tragic news, saying: "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."

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The organization offered its condolences to Nascimento's family, friends, teammates, and loved ones, saying: "Our thoughts and deepest condolences are with Allan's family, friends, teammates, and loved ones during this incredibly difficult time."

Nascimento, born in Sao Paulo, had a successful career in the UFC, winning 22 of his 29 fights. He made his UFC debut in 2021 and went on to win four of his six fights.

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Career Highlights and Tributes

Nascimento's impressive record included a 22-7 professional record, with four Performance of the Night bonuses for his submission victories over Carlos Hernandez and Cody Durden. He also competed in multiple promotions, including RIZIN, Legacy FC, and Dana White's Contender Series.

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Fans and fellow fighters took to social media to pay their respects, with one fan posting: "Rest in peace, it's crazy he literally just fought like less than a month ago." The outpouring of support and condolences highlights the impact Nascimento had on the MMA community.

Career Milestones and Legacy

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Nascimento's career spanned multiple promotions, including the UFC, RIZIN, Legacy FC, and Dana White's Contender Series. He finished his career with a 22-7 professional record, securing a lasting legacy in the world of mixed martial arts.