Tyson Gay tests positive for banned substance

American 100-meter record holder Tyson Gay, who had promoted himself as a clean athlete, tested positive for a banned substance and said he will pull out of the world championships next month in Moscow. Gay wouldn't reveal the substance in a phone American 100-meter record holder Tyson Gay, who had promoted himself as a clean athlete, tested positive for a banned substance and said he will pull out of the world championships next month in Moscow. Gay wouldn't reveal the substance in a phone World-class sprinter Tyson Gay appeared to be back on track after injuries plagued his career, but he now faces an uphill climb after testing positive for a banned substance, according to Pat Graham of the Associated Press. The news comes prior to next American 100-meter record holder Tyson Gay has admitted to testing positive during an out-of-competition test in May. Gay did

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