Marco Antônio de Lima Ruas is a Brazilian former mixed martial arts fighter, submission wrestler, kickboxer and instructor. Ruas was the UFC 7 Tournament Champion, and also competed for the World Vale Tudo Championship (WVC), PRIDE Fighting Championships and the International Fight League, where he head-coached the Southern California Condors.

The International Fight League was an American mixed martial arts (MMA) promotion billed as the world's first MMA league. It was founded on January 7, 2006, and closed on July 31, 2008. Instead of the established norm for MMA events, where matchups are strictly one-on-one affairs, each IFL card was a showdown between two camps of at least three fighters, each fighter fighting one match against another in the opposing camps.