Rubuta ci gaba don wannan sakin layi - Ya yi wasanni goma sha biyu a gasar zakarun duniya ta IAAF daga 1977 zuwa 1995. Kowane mutum, aikinsa ya zo ne a gasar zakarun duniya ta 1983 IAAF
, inda ya kasance na bakwai a duka. Clarke ya kasance mai lambar azurfa sau uku a gasar (1982, 1987, 1989) kuma ya kuma lashe tagulla a 1992, yana raba girmamawa tare da Mike McLeod, Hugh Jones, Julian Goater, Steve Kenyon, Karl Harrison, Carl Thackery, Kevin Forster, Steve Binns, Tim Hutchings, Gary Staines, Richard Nerurkar, da Eamonn Martin, da sauransu.