With a career that began at Orangeburg High School in 1937, Seymour went to Aiken in 1940 to fight under Cy Copley and quickly became a main event fighter as a middleweight. As a professional boxer, Seymour ran an impressive string of 42 consecutive victories. In 1942, Seymour entered the U.S. Marine Corps and boxed to an impressive record of 21 wins and two losses under the tutelage of legendary Tommy Loughran. His military career also took him to the Pacific Rim through the battle of Okinawa. He also completed a tour of duty in China before his discharge in 1946.
He has enjoyed a prosperous career away from the ring as well with success in civic organizations and with the federal government.