Leonardo Vieira

Main Achievements

Black Belt Accolades:

• 2x 1st Place — ADCC World Championship (2003 / 2005)
• 1st Place — IBJJF World Championship (1999)
• 2x 1st Place — IBJJF Pan Championship (2002 / 2004)
• 1st Place — CBJJ Brazilian Nationals (1998)
• 2x 2nd Place — ADCC World Championship (2007 / 2011 Silver Medalist)
• 2nd Place — IBJJF World Championship (1997 Silver Medalist)
• 3rd Place — IBJJF World Championship (2000 Bronze Medalist)

Colored Belt Accolades:

• 1st Place — IBJJF World Championship (1996 Brown Belt)

Grappling Profile & Statistics

• Total Professional Record — 41 Wins / 13 Losses
• Submission Finish Rate — 32% (13 victories via submission)
• Signature Finishes — The Brabo Choke stands as his highest-percentage submission weapon (accounting for 23% of his finishes), followed tightly by Guillotines and Rear-Naked Chokes.

Overview

Leonardo Alcantara Vieira, widely known by his nickname “Leozinho” (Little Leonardo) or simply Leo, is universally regarded as one of the most dynamic and crowd-pleasing grapplers to ever step onto a mat. A multi-time IBJJF and ADCC World Champion, Vieira’s explosive pacing, guard-passing mastery, and charismatic presence defined an entire era of modern submission grappling. Beyond his historic competitive achievements, he is a visionary team builder who co-founded the global powerhouse Checkmat BJJ, cementing his legacy as one of the sport’s greatest master instructors.

Early Life and Humble Beginnings

Leonardo Vieira was born on March 23, 1976, in Rio de Janeiro, Brazil. The son of a janitor, Leo grew up in humble conditions and began his martial arts journey at the tender age of six, training at the historic Academia Master under Romero Cavalcanti.

When Master Cavalcanti partnered with his senior students to form Team Alliance in 1993, Leo became one of the young squad’s premier driving forces. At just 21 years old, standing atop the podium after winning the historic, inaugural 1996 World Championship as a brown belt, he was officially awarded his black belt.

The Historic Rise to Stardom

As a rookie black belt in 1997, Leo ignited a legendary rivalry with Gracie Barra’s Marcio Feitosa. Though he dropped the first encounter, Leozinho returned in 1998 to defeat Feitosa in a grueling final to secure his first black belt World Championship title. He would remain at the absolute pinnacle of the sport, capturing the prestigious IBJJF Pan Championship and the CBJJ Brazilian Nationals.

However, Leo reached his absolute athletic peak on the international No-Gi circuit. He captured back-to-back gold medals at the world’s most prestigious submission grappling tournament, the ADCC (Abu Dhabi Combat Club) World Championship, in 2003 and 2005, putting on masterclasses in dynamic wrestling, passing, and back-takes.

Team Evolutionary Paths & Global Leadership

In 2002, political friction over tournament prize money led Leo and a massive coalition of elite black belts to break away from Alliance to form Master Team, which later evolved into Brasa Clube de Jiu-Jitsu. Seeking even greater autonomy to build their own vision, Leo and his brothers eventually branched out in 2008 to establish Checkmat BJJ. Under Leo’s masterful guidance, Checkmat grew into a global powerhouse, and he became one of the sport’s greatest coaches—molding iconic champions like Marcus Almeida “Buchecha”, Lucas Leite, and João Assis.

In 2011, after years away from active competition, a 35-year-old Leozinho shocked the community by accepting a late-notice invitation to return to the ADCC. Competing a weight class above his usual division in arguably the toughest bracket in the tournament, the veteran defied the doubters by dismantling the new generation’s elite to capture an iconic silver medal.

On the mats, his tactical framework prioritizes the Brabo choke and dynamic guard passing layouts as his preferred positional systems.