The IOC has stripped U.S. runner Crystal Cox of her gold medal from the 4x400m relay at the 2004 Athens Olympics for doping.
Cox admitted in 2010 to using anabolic steroids and accepted a four-year suspension and disqualification of her results from 2001 to 2004.
The IOC executive board on Saturday formally disqualified Cox and took away her gold medal.
Cox ran in the preliminaries for the American team. Sanya Richards ran the final along with Dee Dee Trotter, Monique Henderson and Monique Hennegan.
Under international rules, an entire relay team can be disqualified because of the doping of one member, even an alternate.
If the U.S. is stripped of the victory, Russia would move from silver to gold and Jamaica from bronze to silver.