Jose Casas Ruiz

José Casas Ruiz is a Mexican professional wrestler (called a Luchador in Spanish) and trainer working for Consejo Mundial de Lucha Libre (CMLL) under the ring name Negro Casas. He is the son of former wrestler turned referee Pepe Casas, and part of the large Casas wrestling family; brother of professional wrestlers El Felino and Heavy Metal and uncle of Puma, Tiger, Canelo Casas, Rocky Casas, Danny Casas and many more.

Casas has trained several wrestlers, including Mephisto, Kazushige Nosawa, T.J. Perkins, Rocky Romero, and Ricky Marvin. Casas has worked all over the world, making appearances for WWE in the United States of America as well as touring with New Japan Pro-Wrestling (NJPW) in Japan for over a decade. In Mexico Casas has worked for CMLL since the 1990s but has also wrestled for the Universal Wrestling Association (UWA), World Wrestling Association (WWA) and International Wrestling Revolution Group (IWRG).

In 2008 Negro Casas joined with Mr. Niebla and Heavy Metal to form the group La Peste Negra (Spanish for "the Black Plague"), a group that would later be joined by El Felino.