Competing at the two first World Championships, where he reached the semi-final (1983 and 1987), he set his personal best 200 metres time with 20.29s in 1983 and his 100 metres personal best time of 10.11s from a 6th-place finish at the 1988 Olympic Games in Seoul, South Korea..
The doctor that supplied the sprint group (which included Ben Johnson, Desai Williams, Tony Sharpe, Angela Taylor, Kevin Tyler, Mark McCoy and others) was known as Jamie Astaphan, a physician from St. Kitts. Williams was never proven to be part of this doping ring as coach Charlie Francis was not aware of his, or Mark McCoy's alleged doping programs. Charlie was the one that coordinated the programs with Astaphan, and came up with drug protocols, as he himself was an admitted steroid user leading up to the 1972 Olympic games. He competed in the 4 by 100m relay.
He now works as the speed coach for the Toronto Argonauts.