Pedro Aguayo better known as Perro Aguayo and and El Can de Nochistlan, was a famous Mexican wrestler in the 1970s and 1980s. His son also wrestles as Perro Aguayo, Jr. or El Hijo Del Perro Aguayo. He is one of the biggest box office attractions in lucha libre history and was the last major rival of El Santo. Often prone to blading, Aguayo has been described by American pundits as a cross between Terry Funk and Bruno Sammartino (for his willingness to brawl and overpower opponents). He was the first person ever crowned the WWF Light Heavyweight Champion, though pre-1997 title reigns are not included in WWE's official "canon" for that title.

Aguayo was synonymous with the Universal Wrestling Association as one of its top heels and one of the top heels lucha libre overall. In the 1990s, Aguayo helped found Asistencia Asesoría y Administración and his three way feud with Konnan and Cien Caras proved to be one of the most successful programs in terms of box office receipts. He stayed with AAA until 2000, even making an appearance on WWF's Royal Rumble in 1997 in a match that featured lucha libre legends like Canek, Mil Máscaras and up and comers who would later make names for themselves like Héctor Garza and Heavy Metal. He came to Consejo Mundial de Lucha Libre to feud with Los Capos. He was successful in taking the hair of Cien Caras and Máscara Año 2000 but he lost his slated retirement match against Universo 2000. He remained in retirement until his son began feuding with Los Capos as well. Cien Caras claimed he could not retire until his business with Aguayo was finished so a double hair vs. hair match was set with Perro Aguayo and Perro Aguayo taking on Cien Caras and Máscara Año 2000. The Aguayos were successful and Perro Aguayo returned to retirement and Cien Caras went into semi-retirement.