Jamaican discus thrower Traves Smirkle faces doping probe

Jamaica's Traves Smikle hurls a discus during qualifications at the London 2012 Olympic Games.
Adrian Dennis/Getty Images

Former 100-meter world-record holder Asafa Powell and Olympic relay gold medalist Sherone Simpson tested positive for the stimulant oxilofrone at the national championships. Discus thrower Allison Randall and another unnamed athlete also had positive tests at the meet.

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