The 37-year-old tested positive for a banned substance last year at a race in Mexico.
The long-term metabolites method can detect steroids that were taken more than six months prior.
The two-time American U.S. in the steeplechase considers himself to be a man of the people.
David Rudisha's coach says they are looking for an "extra edge."
The repeat gold medalist is adamant that he's clean.
The still unpublished results of a 2011 athlete survey are very telling.
The double-Olympic medalist's coach dismisses the doubters.
A handy reference guide for runners.
Former USATF CEO wants to give up the fight against doping.
Russian Natalia Volgina may be stripped of her Old Mutual Two Oceans Marathon title.