[1] On 11 August, the Jamaican national team, led by Nesta Carter, Michael Frater, Yohan Blake and Usain Bolt, won the gold medal and broke their own world record of 37.04 set at the 2011 World Championships in Athletics, with a time of 36.84.

Carter did not start well, and Trell Kimmons of the United States led the first 100 metres.

Although the Canadian team finished third, they were disqualified after third leg runner Jared Connaughton stepped on a line, and the bronze medal went to Trinidad and Tobago.

[3] In May 2014, the United States Anti-Doping Agency imposed a one-year suspension on a 4 × 100 m relay team member Tyson Gay.

[4][5][6] In May 2015, the International Olympic Committee formally requested the United States Olympic Committee to collect the medals from teammates Trell Kimmons, Justin Gatlin, Ryan Bailey, Jeffery Demps and Darvis Patton.