Tyson Gay

Jamaica defends drug testing program amid accusations of poor controls

The World Anti-Doping Agency (WADA) issued a statement on Thursday urging JADCO to respond "urgently and appropriately" to Shirley's comments, which have followed a string of positive doping tests returned by Jamaican athletes in recent months.

Without real competition, will watching Bolt run get boring?

Having secured the same double at the last two Olympics and the 2009 world championships and almost certainly been denied another only by a false start in the 2011 world 100m final Bolt's victories are less races than processions.

Sprinter Tyson Gay failed more than one drug test this year

Earlier this month, Gay revealed he had tested positive in an out-of-competition test he took on May 16.

I'm just trying to improve the sport: Usain Bolt

The world's fastest man, though, stopped short of condemning fellow Jamaican sprinters Asafa Powell and Sherone Simpson or American rival Tyson Gay.

Coach defends Jamaican sprinters Powell, Simpson

Italian police are investigating the two sprinters and their Canadian trainer Christopher Xuereb on suspicion of violating doping laws, Italian media reported.

Here's the bright side of the latest doping scandal

The cases, which were disclosed Sunday, come less than a month before the world championships in Moscow and cast another drug shadow over what is considered the marquee sport of the Olympics.

Randall is third Jamaican to admit positive dope test

The 25-year-old, who holds the Jamaican discus record with a distance of 61.21 metres, said she did not have the desire or the means to cheat.

Adidas suspends contract with sprinter Tyson Gay

Adidas' agreements with athletes give it the right to terminate the contract "if the athlete is found guilty of the possession or use of drugs or any other prohibited substance by the relevant governing sports body having jurisdiction over the athlete."

Powell, Gay latest entrants in list of sprint doping scandals

Here's a factbox on sprinters who have been involved in doping scandals in the past 25 years.

Sprinters Tyson Gay, Asafa Powell fail tests as doping scandal hits athletics

Tyson has run the fastest three 100 meters of the year and his clash with Jamaica's Olympic 100 and 200 champion Usain Bolt would have been the highlight of the championships.