Wanderlei César da Silva (/ˈvændərleɪ/ VAN-dər-lay; Portuguese: ; Japanese: ; born July 3, 1976), nicknamed "The Axe Murderer" and "Cachorro Louco" (Portuguese for "mad dog"), is a Brazilian / American mixed martial artist who has competed in Japan's Pride Fighting Championships and the American-based Ultimate Fighting Championship (UFC). He holds the record for the most wins, knockouts, title defenses, and longest winning streak in PRIDE history. He is the former PRIDE Middleweight Champion, and the 2003 PRIDE Middleweight Grand Prix Tournament Champion. He is currently signed with Rizin Fighting Federation and Bellator MMA.
Silva's aggressive style is rooted in street brawling, refined with elements of Muay Thai and kickboxing which he began learning at the age of 13 in Chute Boxe Academy in his hometown Curitiba. As a late teen he joined the Brazilian army and was quickly recognized for his fighting talents and rose up in the ranks. There he was asked to join Vale Tudo and Brazilian jiu-jitsu school. Silva enlisted after already winning fight tournaments in his age group in Brazil. Silva would develop scar tissue around his eyes from fighting in bare-knuckle vale tudo.