Alberto Juantorena

Alberto Juantorena (born 3 December 1950) is a Cuban former runner. He is the only athlete to win both the 400 and 800 m Olympic titles, which he achieved in 1976. He was ranked as world's best runner in the 400 m in 1974 and 1976–1978, and in the 800 m in 1976–77, and was chosen as the ''Track & Field News'' Athlete of the Year in 1976 and 1977. Provided by Wikipedia