Former U.S . Postal Service rider Scott Mercier claims there was a culture of doping . Postal Service team has been detailed by one cyclist who resisted the temptation to dope . He says he was offered steroids by team doctor Pedro Celaya in 2003 . Armstrong denies the allegations and will challenge USADA at Court of Arbitration for Sport . Former teammates of Lance Armstrong have testified against the famous cyclist .
Former U.S . Postal Service rider Scott Mercier claims there was a culture of doping . He says he was offered steroids by team doctor Pedro Celaya in 2003 . Armstrong denies the allegations and will challenge USADA at Court of Arbitration for Sport . Former teammates of Lance Armstrong have testified against the famous cyclist .