Sprinter Jerome Young, a central figure in a doping case that could cost the U.S. relay team its gold medal from Sydney, was banned for life by the U.S. Anti-Doping Agency following his second positive test for a banned drug.
Young tested positive for EPO at a Paris meet in July, USADA said.
Young, 28, tested positive for the steroid nandrolone in 1999 but was exonerated by a U.S. appeals panel in July 2000, avoiding a two-year ban. He ran in the opening and semifinal rounds of the 2000 Games but not in the 1,600-meter final anchored by Michael Johnson.
All six members of the relay squad received gold medals, but Young's was stripped.