Mixed martial arts fighter Allan Nascimento has died at the age of 34, says the UFC. According to MMA's leading promotion, the Brazilian flyweight was found unresponsive on Monday morning after suffering an apparent heart attack in his sleep. Nascimento had been with the UFC since 2021 and his last fight was a split-decision loss to Mitch Raposo in June. That left Nascimento with an overall MMA record of 22 wins and seven losses, with a 4-2 record in the UFC. Nascimento trained at Chute Boxe under coach Diego Lima in Brazil, and was a training partner to former UFC champion Charles Oliveira, UFC lightweight Elves Brener and more.