As Rey Mendoza was still very much in demand all over Mexico, and as a result travelled a lot, Bobby Bonales completed most of the Díaz' training.

Later on the team worked as Los Búfalo Salvaje ("The Wild Buffalos") again with José de Jesús as "I" and Alfredo as "II".

In 1970, the brothers came up with new ring characters, Los Villanos ("The Villains"), and the name, along with a very distinctive "X" designed mask, stuck with them for the rest of their careers.

[3] Villano I and II held the Distrito Federal Tag Team Championship at one point, although records are unclear on who they defeated for the belts.

Villano I and II won the Arena Coliseo Tag Team Championship in the early 1970s, but did not achieve much else while working for EMLL.

[2] 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.