Asafa Powell
Carter went to the new season with a slow start. His season best was 9.98, behind American Ryan Bailey and teammate Asafa Powell. At the 2015 Bahamas World Relays, Nesta Carter ran the first leg at the 4 × 100 m relay, with exactly the same team that ran at the 2013 World Championships, which ended second behind USA relay team that consisted of Michael Rodgers, Justin Gatlin, Tyson Gay and Ryan Bailey. At the 2015 IAAF World Championships, the Jamaican team went on to the finals of the 4x100 meter relay, that consisted of Carter, Asafa Powell, Nickel Ashmeade and Usain Bolt, which ended with another gold medal with 37.37. This was Carter's fourth world title with the Jamaican team.