Roberto González Cruz (May 22, 1946 – April 6, 1986) 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, Cruz joined the breakaway promotion, the Universal Wrestling Association, where he held four more world championships in the early 1980s.