Tyler Hamilton

On September 14 2006 USA Cycling announced information from the (UCI) "regarding Tyler Hamilton and his alleged involvement in 'Operación Puerto' along with a request to move forward with disciplinary action. The positive sample at the Olympics and the positive test at the Vuelta were not the only indications that Hamilton was manipulating his hematocrit level. His career in a shambles he raced for lesser team after his suspension tested positive for DHEA (in an OTC herbal anti-depressant) and retired.

He is the only American rider to win one of the Five Monuments of Cycling. In 2004 he won a gold medal at the time trial.