Leo Vieira was born in Rio de Janeiro, Brazil on March 23, 1976. Brazilian Jiu Jitsu grappler who has risen to fame for competing in the prestigious Abu Dhabi Combat Club (ADCC) tournament, including as a winner in 2003 and 2005. He finished as the IBJJF World Championship runner-up in 1997 and 1999 after winning as a brown belt in 1996..