Olympic gold medal-winning cyclist Tyler Hamilton, whose win at the Athens Games was overshadowed by a blood doping scandal, retired from cycling after testing positive for another banned substance.

• 雅典奥运会自行车赛金牌得主-泰尔*汉密尔顿蒙上了血液禁药丑闻阴影，在另一项违禁药品检测阳性后最终选择了退役。