MMA veteran Gerônimo Mondragon disappears after diving into a river in the Amazon.

Gerônimo Mondragon disappeared this Saturday (13) after diving on a beach in Rio Negro, in the region of the municipality; He was with his girlfriend

Jamis Gomes Jr

14/12/2025 | 1:18

Mondragon (pictured) has a professional record of 34-14. Photo: Reproduction/Facebook

Gerônimo Mondragon disappeared this Saturday (13). Former UFC fighter, the 45-year-old heavyweight (up to 120,2 kg) disappeared after diving into a beach on the Rio Negro, in the region of the municipality. According to local information, Gerônimo was with his girlfriend when he went for a swim in the river.

The whereabouts of Gerônimo Mondragon are still unknown. According to information published on the website 'O Liberal', the heavyweight fighter entered the water but did not return. Local authorities are continuing to investigate the case.

See too

Former UFC fighter Aleksei Oleinik is knocked out by Mondragon in bare-knuckle boxing. Photo: Reproduction/Twitter/bareknucklefc
After a devastating debut, Brazilian giant faces former UFC champion in bare-knuckle boxing
Former UFC fighter Aleksei Oleinik is knocked out by Mondragon in bare-knuckle boxing. Photo: Reproduction/Twitter/bareknucklefc
VIDEO: At 47 years old and in financial crisis, ex-UFC fighter suffers brutal knockout from Brazilian in 'bare-knuckle boxing'
Video: Fedor's brother beats Gabriel Napão by knockout in Russia

Among the local authorities, rescue teams were activated to locate Gerônimo Mondragon. Besides being a well-known fighter in the Brazilian MMA scene, Gerônimo is the Undersecretary of Public Security for São Gabriel da Cachoeira, in Amazonas.

PUBLICITY:

Due to the disappearance of Gerônimo Mondragon, the City Hall of São Gabriel da Cachoeira published a note on its official Instagram profile, transferring an event of the Christmas festivities in the region in respect for what happened this Saturday (13).

PUBLICITY:

Who is Gerônimo Mondragon?

Gerônimo Mondragon is known in the combat sports community for his stints in major organizations throughout his career. Gerônimo has competed in the Premier Fight League (PFL), Revelation FC, Rizin, Jungle Fight, Among others.

Geronimo Mondragon signed a contract with the UFC in 2012. However, his debut was canceled after a blood test revealed he had hepatitis B. Because of this, Mondragon was released from his contract and never had the opportunity to fight for the company.

PUBLICITY:

In his most recent appearance in the world of fighting, Geronimo Mondragon defeated Russian Aleksei Oleinik via knockout in the first round of bare-knuckle boxing in April 2025.

Read More about: ,

Previous news Electrifying! Joanderson Brito defeats Isaac Thomson in style at UFC Vegas 112.
Next news Marcus Buchecha has some scares on his feet, controls the fight on the ground, and suffers a draw at UFC Vegas 112.

Latest news