Born in Caracas, Venezuela, Mijares became involved in amateur wrestling as a youth and later competed and won a silver medal at the Pan-American Games in 1958.
Eventually persuaded by Negro to enter professional wrestling, he began training under Jene Howard in Barcelona before making his debut before the end of the year.
Leaving Houston a year later Mijares toured the United States with the National Wrestling Alliance wrestling in numerous regional territories including for promoters such as Paul Boesch, Sam Muchnick, Nick Gulas, Eddie Graham, Jim Crockett, Vince McMahon, Sr., Joe Blanchard and Carlos Colon.
Several months later, he would also defeat Harley Race for the NWA Central States Heavyweight Championship in St. Joseph, Missouri on July 7 holding the title for half a year before losing to Roger Kirby in December.
In recent years, Mijares works with convicts as a security monitor for the Bexar County Adult Probation Department in San Antonio, Texas.