Antônio Carlos Silva (born 14 September 1979) is a Brazilian professional mixed martial artist and kickboxer who competes in the Heavyweight division. A professional MMA competitor since 2005, he has competed for the UFC, Strikeforce, EliteXC, Cage Rage, Fight Nights Global, World Victory Road, K-1 HERO'S, and Cage Warriors. He is the former EliteXC Heavyweight Champion, Cage Rage World Heavyweight Champion, and Cage Warriors Super Heavyweight Champion.
Originally from Brasília, Distrito Federal, Silva began training in karate at the age of four, and received his black belt at the age of 12. After 13 years of karate training, Silva transitioned to Brazilian jiu-jitsu and judo at the age of 17.
Silva began his career with the UK-based Wolfslair MMA Academy in 2005. In 2006, after his bout with Tadas Rimkevicius, Wolfslair requested (to Silva's instructor Mario Neto) that Silva leave the team and return to Brazil. The gym claims Silva owed it over £20,000; however, Silva states that it owed him £6,000 in fighter purses for two fights, for which he was promised £3,000 each. After training with Brazilian Top Team during the dispute, Silva joined American Top Team in Coconut Creek, Florida. He also trained at the Imperial Athletics gym in Boca Raton, Florida, for his quarterfinal bout with Fedor Emelianenko in the Strikeforce World Grand Prix Heavyweight Tournament.