Cancerbero previously worked as Messala for many years, forming the team Los Romanos along with Caligula (who was later known as Raziel).
The name Cancerbero is Spanish for Cerberus, the three-headed hound, which according to Greek mythology, guards the entrance to Hell.
El Monstruo I was unmasked by Gran Cuchillo on December 8, 2002 when he lost a Lucha de Apuesta, bet match.
He competed against Akuma, Blue Panther Jr., Canelo Casas, Delta, Disturbio, Esfinge, Flyer, El Gallo, Guerrero Maya Jr., Joker, Pegasso, Raziel, Sagrado, Stigma and Boby Zavala.
[8][9] On December 25, 2015 as part of CMLL's annual Infierno en el Ring show Cancerbero was one of twelve men risking their mask in the main event steel cage match.