The Jamaican sprinter, 25, clocked the fastest time in the fastest-ever field of runners to become just the second man in history – after the American Carl Lewis in 1984 and 1988 – to win back-to-back Olympic gold medals in track and field's signature event, the 100-meter dash.
Bolt's time of 9.63 was an Olympic record and the second-fastest time ever, trailing his own world record of 9:58, set in 2009.
Bolt's Jamaican teammate Yohan Blake, who notoriously beat Bolt at the Jamaican Olympic trials, won silver with a time of 9.75 seconds.
Three Americans were in the field Sunday – Justin Gatlin of Pensacola, Fla., Ryan Bailey of Long Beach, Calif., and Tyson Gay of Lexington, Ky. Gatlin edged out his countrymen, earning bronze with a time of 9.79 seconds.
Gay and Bailey finished fourth and fifth, respectively, with Gay just .01 seconds behind Gatlin.
For the first time in history, seven of the eight runners in the race finished in under 10 seconds.
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