Roberto González Cruz was a Mexican professional wrestler who wrestled under the name El Solitario. During his career he held both the NWA World Light Heavyweight Championship and the NWA World Middleweight Championship. After achieving stardom in Mexico's oldest promotion, Empresa Mexicana de Lucha Libre, Gonzalez Cruz joined the breakaway promotion, the Universal Wrestling Association, where he held four more world championships in the early 1980s. In 1959, Gonzalez Cruz's brother was killed in the ring while wrestling as Othon Banzica, but rather than becoming deterred, Gonzalez Cruz drew inspiration from his death and dedicated himself to lucha libre. He began training under the tutelage of Joe el Hermoso and made his wrestling debut in 1960 at the age of fourteen. Gonzalez Cruz was initially billed as being the son of the legendary wrestler El Santo but later changed his name to El Zica II in honor of his deceased brother. He chose the name El Solitario, derived from the popular comic book character El Llanero Solitario ("The Lone Ranger"'). He also adopted his now trademark gold and black colored costume and golden mask with a fringe around the eyes representing the Lone Ranger's mask. After the change, promoters and fans took notice of the new dynamic wrestler. On November 16, 1965, El Solitario faced Panchito Ramirez in Arena Coliseo located in Guadalajara. He would make his debut in Arena Coliseo Mexico City on September 6, 1966, when he defeated Tony Reyna. In 1966, El Solitario defeated and unmasked Águila Tapatía, that was followed by a win over Mano Blanca. He won his first world title when he defeated Occident Welterweight champion Luís González. El Solitario was now working for EMLL, Mexico's largest promotion company. He was catapulted into stardom within the lucha libre world when he defeated veteran Rey Mendoza in a mask vs hair match on December 13, 1968. A few weeks later, he defeated another legend, Rene Guajardo, and also took his hair in another wager match. El Solitario formed a wrestling trio alongside Dr. Wagner and Angel Blanco; the group was known as "La Ola Blanca" (The White Wave). While in Mexico, he remained one of the most popular headlining stars throughout the country. In the early 1980s, he formed a short lived trios team with Aníbal and Villano III, the group was known as Los Tres Caballeros that ended when Aníbal turned on El Solitario. He won the UWA Junior Light Heavyweight title in 1980 and 1981. In 1982, he won the NWA Light Heavyweight title. That same year, he participated in El Santo's final career match when he teamed up with legends El Santo, Gory Guerrero, and Huracan Ramirez to defeat El Signo, Negro Navarro, El Texano, and Perro Aguayo. Perhaps his biggest match took place on December 1, 1985, when he defeated and unmasked Dr. Wagner in a mask vs mask match. El Solitario had suffered injuries during the latter part of his career, resulting in several infections and illnesses. During a match with Fishman, he re-injured himself and was taken to the hospital while complaining of abdominal pain. His doctors initially misdiagnosed his condition, and it was later discovered that he was suffering from internal bleeding that required immediate surgery. On April 6, 1986, at the age of 39, El Solitario died while on the operating table as a result of a cardiac arrest.