Sport (Years Played): Tennis (1950-1958)
Before Venus and Serena Williams dominated the tennis court, there was Althea Gibson. As the first black woman to compete on the world tennis tour and the first to win a Grand Slam in 1956, Althea was a true titan in a sport that was predominantly white, both then and now. In total, she racked up six Grand Slam singles titles. After her retirement, she went on to become the New Jersey state commissioner of athletics before taking a position on the governor's council on physical fitness.