Usain Bolt says he’ll retire after 2016 Olympics in Rio

Jamaican sprinter says he wants to go out like Ali, Pele.

Usain Bolt: lightning fast in 100 meters (photo)

Only a bolt of a different sort tops Olympic champion's 9.77-second performance.

Usain Bolt says “I know I am clean”

Sprinter speaks for first time since Jamaican teammates failed drug tests.