|1984 Los Angeles||4×100 m relay|
|1986 Edinburgh||4×100 m relay|
|1982 Brisbane||4×100 m relay|
|1983 Edmonton||100 metres|
|1983 Edmonton||4 x 100 m relay|
|Pacific Conference Games|
|1981 Christchurch||4x100 m relay|
|1981 Christchurch||100 metres|
|1981 Christchurch||200 metres|
|1985 Canberra||4x100 m relay|
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 20.29 s in 1983 and his 100 metres personal best time of 10.11 s from a 6th-place finish at the 1988 Olympic Games in Seoul, South Korea.
Williams trained with the Scarborough Optimists Track Club, which was affiliated with the Ben Johnson scandal. Club coach Charlie Francis, working with Dr. Jamie Astaphan, had supplied performance-enhancing drugs to Johnson, Williams, Tony Sharpe, Angella Taylor, Mark McKoy and others.
Williams formerly worked as the speed coach for the Toronto Argonauts and was one of the most respected sprint coaches in eastern Canada, training Olympic athletes Tremaine Harris, Phylicia George and Justyn Warner, among others.
Williams was fired as a coach by Athletics Canada in 2015. A probe found that Williams had violated the organization's sexual harassment policy while a coach in 2010. In 2018, he was handed a life time ban by Athletics Canada.
|1983||World Championships||Helsinki||6th (sf)||200 m||20.71||wind +3.4|
- Ormsby, Mary (2008-08-15). "Olympic stain is all but erased for Desai Williams". Toronto Star.
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