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KUSA-- He was once on top of his field and put on a pedestal for being a role model. After years of allegations, that pedestal is about to be smashed to bits.

Lance Armstrong has reportedly admitted to Oprah Winfrey that he did participate in blood doping and using performance enhancing drugs. It's something some former teammates, like Frankie Andreu, have said for years.

"He's lied to presidents. He's lied to Larry King. He's lied to Oprah before," Andreu told the Associated Press Tuesday. "He's been lying about how many tests he passed."

Former teammates from Colorado say doping was widespread; it wasn't just Armstrong.

"The credibility of all of us who raced in that era is damaged, whether we doped or not," said Michael Carter in a phone interview. Carter raced with Armstrong in 1991.

"I can stand here and say 'I never doped, I never doped,' but everyone's going to say 'Yeah that's what Lance said," Carter said.

Carter says doping was widespread from the mid 1980s up until 2009, when the allegations against Armstrong and others hit their peak.

Carter says Armstrong's downfall is probably a good thing for cycling as a whole.

"We'll get this stuff behind us and let the beautiful sport of cycling be what it is without being tainted," Carter said.

This admission doesn't right all Armstrong's wrongs.

The Justice Department is expected to decide this week whether it will join a whistleblower lawsuit brought by another former teammate. It claims Armstrong defrauded team sponsor the US Postal Service.

Sources tell NBC News Armstrong has not offered to testify against anyone.

(KUSA-TV © 2013 Multimedia Holdings Corporation)

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