US Olympic 400m relay gold medallist Alvin Harrison has accepted a four-year ban for drugs offences, according to the United States Anti-Doping Agency.
USADA says Harrison confessed
A USADA statement said: "Harrison admitted to using numerous undetectable performance-enhancing drugs.
"These included anabolic steroids known as 'the clear' and 'the cream', EPO, insulin, growth hormone and modafinil."
In August, Harrison's twin brother Calvin, a US sprinter, was suspended for two years for a doping violation.
Alvin Harrison, 30, won 4x400m relay gold medals at the Sydney and Atlanta Olympics.
USADA confirmed the evidence against him did not include a drugs test failure.
The statement continued: "In addition to his suspension from 18 October, Harrison forfeits all his competitive results and winnings since 1 February, 2001."
Harrison's is the second "non-analytical positive" involving athletes linked with Balco, the Californian laboratory at the centre of a major drugs scandal.
US sprinter Kelli White was banned and stripped of her 100m gold from the 2003 World Championships after admitting drugs offences without actually testing positive.
USADA said that 10 other athletes had received
sanctions for positive tests for the steroid THG or modafinil, two of the drugs linked to Balco.
"We said a year ago that the situation at Balco appeared to be doping of the worst sort," said USADA chief executive Terry Madden.
"Unfortunately, this has proven to be true."