From 1967 to 1981 she was six outdoor and four times in the hall U.S. champion in their purpose-built track and put several American records. In 1967, she won at the Universiade and at the Pan American Games in Winnipeg.
Even as she studied at the Tennessee State University, she won at the 1968 Olympic Games in Mexico City about 800 meters before the Romanian Ileana Silai ( silver) and the Dutch Maria Gommers (bronze). At the 1972 Summer Olympics in Munich, she won the silver medal in the 4 x 400 - meter relay along with teammates Mable Fergerson, Cheryl Toussaint and Kathy Hammond, reaching over 800 m as the semi-finals as the 1976 Olympic Games in Montreal. Only the U.S. boycott of the 1980 Moscow Games kept them from a fourth Olympic start.