Former U.S . Postal Service rider Scott Mercier claims there was a culture of doping . Mercier says he was offered steroids by team doctor Pedro Celaya in 1997 . He also alleges that the riders were given injections to increase their stamina and speed, but they never used them because it would have been too dangerous for them. Both Hamilton and Hincapie testified against Armstrong in USADA 's report , while admitting to using performance enhancing substances . 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 . Mercier says he was offered steroids by team doctor Pedro Celaya in 1997 . He also alleges that the riders were given injections to increase their stamina and speed, but they never used them because it would have been too dangerous for them. Former teammates of Lance Armstrong have testified against the famous cyclist .