Negro Casas came into Lucha Libre with an excellent pedigree as the son of Pepe Casas (and the brother of two other Luchadores), and he proved to be the most talented of the clan.  A natural from the start, Casas would win a plethora of championships in Mexico both as a single and tag team, and his rivalry/friendship with El Hijo Del Santo made them both for years.  The problem though for any potential WWE Hall of Fame induction is that Casas was not that successful outside of Mexico and did nothing of note in an American ring.