Washington attended La Sierra High School and the San Bernardino Valley Community College.
He celebrated in 1997 at the World Athletics Championships in Athens, his first international success. With the U.S. 4 x 400 - meter relay, he was world champion before the British squadron. About 400 meters, he won the bronze medal behind his compatriot Michael Johnson and the Ugandans Davis Kamoga.
Washington achieved with the 4-x -400 - meter relay team on 22 July 1998 in Uniondale a world record. This was canceled on 12 August 2008, after the subscriber Antonio Pettigrew had admitted taking growth hormones and EPO.
Only in 2003 was Washington able to return to these successes. In the spring he was World Indoor champion over 400 meters and the 4 x 400 - meter relay team in Birmingham. At the World Championships in Paris, he became world champion again with the 4 x 400 - meter relay. This gold medal of the U.S. squadron was however withdrawn subsequently. About 400 meters he became world champion ( as it later turned out, had been the original winner Jerome Young doped ).
Washington was coached by his former teammate Antonio Pettigrew.