Tyson Gay waits on B sample after positive doping test
Tyson Gay is waiting for the results of his B sample from the US Anti-Doping Agency amid reports he has admitted testing positive for a banned substance.
Gay, the second fastest man in history, is reported to have revealed he was informed by USADA that an A sample from an out-of-competition test had come back positive.
A USADA statement read: "USADA appreciates his approach to handling this situation and his choice to voluntarily remove himself from competition while the full facts surrounding his test are evaluated.
"The B sample will be processed shortly, and as in all cases all athletes are innocent unless or until proven otherwise through the established legal process, and any attempt to sensationalize or speculate is a disservice to due process, fair play, and to those who love clean sport."
Gay has reportedly pulled out of the American team for next month's World Championships in Moscow.
The American's showdown with Usain Bolt over the 100 and 200m was set to be the highlight in the Russian capital, with Gay topping the 100m world rankings this year.
Commenting on the case, USA Track and Field chief executive Max Siegel said: "USA Track and Field is strongly opposed to doping, and we respect the work that USADA has done as a leading agency globally in the fight against drugs in sport.
"We do not know the facts of this case and look to USADA to adjudicate it and handle it appropriately. It is not the news anyone wanted to hear, at any time, about any athlete. As we approach the World Championships, we will remain focused on the competition at hand and winning the right way."
Gay has been involved in the fight against doping, having participated in a US anti-doping programme called 'Project Believe', for which he submitted voluntarily to extra testing.
The 30-year-old, whose 9.69seconds clocked in 2009 is second only to Bolt in the all-time rankings, won the sprint double at the 2007 World Championships in Osaka, but has been plagued by injury problems in recent seasons.
He has been back to full fitness this year, though, and leads the rankings with 9.75secs. Indeed, he has run the three fastest times of the year, with Bolt's best 9.94s.
The news, should it be confirmed, would be a hammer blow to the credibility of the sport, with Gay one of its biggest names.
Shortly after the reports about Gay emerged, the Jamaican Gleaner newspaper reported several positive drug tests from the country.
Bolt's agent Ricky Simms confirmed, though, that the Olympic champion was not among them.
He said: "I was just with him in Jamaica and we've had no information and we've not been contacted by anyone. It is not anyone that I'm connected with."