YOKOHAMA, Japan-- World 100m record holder Asafa Powell pulled up with a hamstring ... The Jamaican, who broke the 100m world record with a run of 9.74 seconds in Italy earlier this month, was ...

Justin Gatlin's nephew adorably challenged Asafa Powell and Usain Bolt's kids ... capping his career with a 100m personal-best time (9.74), placing him fifth on the all-time list of 100m male ...