Díaz was part of a well-known Mexican wrestling family that includes four other Villanos, I, II, III and IV.

[4] In May 1976, Díaz made his professional wrestling debut using the name "Rokambole" (originally used by his older brother Arturo before he became Villano III).

[6] Villano IV and V began working for World Championship Wrestling (WCW) as part of the influx of luchadores in 1996.

Villano V made his debut at the 1996 World War 3 event as part of the Three Ring, 60 man battle royal.

[8] The brothers played the role of a heel and would occasionally cheat by switching places while the referee was distracted (all Villanos wore identical attire, aside from their Roman numeral distinctions).

[9] They also worked an eight-man tag match at Clash of the Champions XXXV, alongside Psychosis and Silver King against Guerrera, Super Calo, Héctor Garza and Lizmark Jr.[10] While working in WCW, Villano IV suffered a neck injury as a result of a failed move by Kanyon and Raven.

[17] On September 20, 2012, Mendoza Jr. made his debut for the Japanese Wrestling New Classic (WNC) promotion, when he was defeated by Dave Finlay in the main event at Tokyo's Korakuen Hall.

The Villano duo lost to Máscaras and El Mesias in the first round and lost to El Texano Jr. and Súper Nova in the second round qualifying them for the finals where the losing team would be forced to either unmask (Villano IV) or have their hair shaved off (Mendoza Jr.).

[5] Díaz was adamant that his sons get a good education instead of becoming wrestlers, wishing that they become lawyers or doctors as he wanted to spare them the physical suffering he experienced himself.