Jamaica's Usain Bolt (1st, R) sprints during the men's 4x100m relay final of Athletics at the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, on Aug. 19, 2016. Jamaica won the gold medal. (Xinhua/Yin Bogu)
2 Usain Bolt (Jamaica)
30, sprinter. Regarded as the fastest human ever timed, Bolt won the 100m, 200m and 4X100m relay at three consecutive Olympic Games since Beijing 2008, and is the first man to hold both the 100m and 200m world records since fully automatic time became mandatory. He was crowned the IAAF World Athletes of the Year for the sixth time in 2016.