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Two training partners meeting on the mat.Drawn in cream, forest green, and muted terracotta. People and objects are symbolic illustrations.
Portrait unavailable. General BJJ illustration; not a likeness of this person.Illustration: The BJJ Story

Leo Vieira

“Leozinho”

Source: bjjheroes.com

Leo Vieira's story runs from a purple belt teaching beginners to world titles, brabo instruction and the founding of Checkmat.

Biography

Leo “Leozinho” Vieira is a world champion and Checkmat co-founder whose teaching began before he reached black belt. Chico Mendes remembers arriving for an introductory class at Romero “Jacare” Cavalcanti's academy and finding a purple-belt Vieira teaching it. Years later, after training together in São Paulo, Mendes received his black belt from Vieira in December 2004. Born in Rio de Janeiro in 1976, Leonardo Alcantara Vieira found more than a sport in Cavalcanti's academy. In childhood recollections published by JitsMagazine in 2023, he described feeling stranded between groups divided by wealth. Training offered a place where, in his experience, money, skin color and religion did not decide whether he belonged. Winning and losing became familiar parts of each day's practice, and he credited that experience with building his confidence. His understanding of his teacher also changed with time: as a coach himself, he came to appreciate how Cavalcanti's background in physical education informed the development of athletes. Cavalcanti awarded Vieira his black belt and encouraged a move beyond Rio. In a 2020 interview recap published by FloGrappling, Vieira recalled his teacher urging him to go to São Paulo and train with Fábio Gurgel. His competition record with Alliance shows the progression across those years. He won the adult brown-belt featherweight division at the 1996 World Championship. In 1997 he took second at black-belt lightweight behind Márcio Feitosa; in 1998 their order on the podium was reversed, with Vieira the champion. Vieira's memories of those competitions give a sense of their changing surroundings. Speaking to VF Comunica in 2024, he recalled blue- and purple-belt events held on rice-straw mats in rented parking areas under the Rio sun. The setting he remembered for his black-belt world title was the crowded Tijuca Tênis Clube, where the narrow entrances and packed venue contributed to the intensity of the occasion. His success extended to ADCC, where he won the men's under-66-kilogram title in 2003 and again in 2005. In 2011 he earned silver in the under-77-kilogram division. Alongside the world title, the IBJJF also recognizes him as a Pan and Brazilian National champion. Vieira's teaching includes a four-part course devoted to the brabo choke. The public curriculum on BJJ Fanatics follows it through half guard, side control, mount, turtle and guard, and connects these positions. For context, instructor Stephan Kesting describes one gi version in a separate Grapplearts article: it uses the opponent's lapel and can be attacked from top half guard before passing the guard. Kesting distinguishes that lapel-based attack from the no-gi brabo. After Alliance, Vieira helped establish Brasa and later Checkmat. Checkmat's own history dates its beginning to 2008 and describes a founding group of brothers and students: alongside Leo, it names Ricardo Vieira, Leandro Vieira, Chico Mendes and Sebastian Lalli. Mendes's involvement connects that new team to the introductory class he had once taken under a much younger Vieira. Other athletes describe different ways into Vieira's training environment. Marcus “Buchecha” Almeida has called Vieira his master and recalled enjoying watching him while developing his own jiu-jitsu. An IBJJF guide published in 2022 credited Vieira's Southern California academies with helping develop Almeida, Lucas Leite and Nathalie Ribeiro. Raquel Canuto offered a more detailed account of joining that environment. She said Buchecha arranged a meeting at which Vieira offered her and Renato a training base, coaching, a team behind them and room to make their own choices. Recalling their month at Checkmat headquarters for the 2018 Worlds camp, she described both the demands of the training and the welcome they received. Vieira described his own approach to that work in 2024. As a competitor, he had looked beyond his own discipline for useful ideas; as a teacher, he continued studying other subjects to put that learning into his athletes' development. In May 2022, ONE Championship announced his appointment as Vice President of Grappling. Vieira presented the role as an opportunity to help shape its submission-grappling divisions. Two years later, he explained that placing grappling alongside major MMA bouts was intended to raise the athletes' visibility and standing. He also described a practical limit: the relevant monthly cards had only one or two places for grappling contests. The relationships behind that work mattered to Marcelo Garcia when he discussed his return to competition in November 2024. In an interview published by ONE, Garcia said Vieira's close connection with him and his family helped draw him to the promotion. He felt that the organization respected the value of his time and work.

Sources for this profile

Competition results

Recorded tournament results, newest first
YearEventResultDivision
2013ADCC 2013Source: adcombat.com-77 kgNo-giVerified4th place-77 kgNo-giVerified
2011ADCC 2011Source: adcombat.com-77 kgNo-giVerified2nd place-77 kgNo-giVerified
2007ADCC 2007Source: adcombat.com-66 kgNo-giVerified2nd place-66 kgNo-giVerified
2005ADCC 2005Source: adcombat.com-66 kgNo-giVerified1st place-66 kgNo-giVerified
2000ADCC 2000Source: adcombat.com-77 kgNo-giVerified4th place-77 kgNo-giVerified
1998IBJJF World ChampionshipSource: en.wikipedia.org-76 kgGiVerified1st place-76 kgGiVerified

Lineage

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Trained under

Students1