A former teammate of once acclaimed, now embattled former cyclist Lance Armstrong said Friday that there was no question why U.S. Postal Service team members doped during big races.

"It was done by the team, but it was done for the Tour de France so I could be a good teammate for Lance Armstrong," Tyler Hamilton told CNN on Friday. "He wanted you to be riding your best in the biggest races."

Hamilton, who admits he's not Armstrong's "biggest fan," is one of 26 witnesses who testified to the U.S. Anti-Doping Agency as part of its investigation into doping by Armstrong and other riders on the team.

In its report, released Wednesday, the organization tasked with keeping banned substances out of U.S. Olympic-sanctioned sports said it had uncovered "overwhelming evidence" that Armstrong had participated in and helped run the cycling team's doping program.

Armstrong's lawyer Tim Herman dismissed the USADA report as a "one-sided hatchet job" and a "government-funded witch hunt" against the seven-time Tour de France winner, who has consistently denied doping accusations. Armstrong decided to give up fighting the agency's investigation in August, after a federal judge dismissed a lawsuit he had filed seeking to stop the probe.

Hamilton was one of two former members of Armstrong's cycling team who spoke to CNN Friday about the doping allegations.

Emma O'Reilly, a former part masseuse and part personal assistant to Armstrong and his cycling team, said she hoped her decision to talk about doping -- which she first did nearly a decade ago and more recently through the USADA report -- will help make the sport of cycling better, rather than simply bring Armstrong down.

"I think that now, more than ever, this is the opportunity for riders to have the choice to ride clean and stay clean if they choose to," O'Reilly told CNN.

The USADA sent its report -- chronicling what it called "the most sophisticated, professionalized and successful doping program that sport has ever seen" -- to international cycling authorities, who are considering a request to strip Armstrong of his Tour de France titles and other wins.

And the International Olympic Committee said Friday that it also is examining the agency's evidence to decide if it should consider taking away the bronze medal Armstrong won in the 2000 Sydney Olympics, according to spokesman Andrew Mitchell.