Courtney Carl Williams went into the men's 100 metres event with a personal best time of 11.04 seconds. Williams was given a non-qualified place in the men's 100 metres after his time was 0.8 seconds slower than the B standard qualifying time. At the Olympic Stadium in London, England, Williams raced in heat four of the preliminary rounds on 4 August. During his heat, Williams finished third with a time of 10.80 seconds. With his heat finish and overall time, Williams did not qualify for the first round. Out of 75 athletes, Williams finished the event overall in 57th place.