Marion Jones: After testing positive for drugs, one of the greatest female athletes ever was stripped of five medals from the 2000 Sydney Olympics. She also spent five months in jail for lying to federal agents.
Ben Johnson: His 1988 gold medal was given to rival Carl Lewis after Canada's record breaking 100-meter sprinter tested positive for steroids.
Bobby Unser: The renowned race car driver won the Indianapolis 500 on May 24 but five months later (October), officials named Mario Andretti the winner after Unser was penalized for passing during a yellow flag.
Dancer's Image: The horse won the 1968 Kentucky Derby but a lab report revealed he took Phenylbutazone and stripped him of the title and prize money.
Danny Almonte: Weeks after the Bronx team finished third at the Little League World Series, it was discovered Almonte was actually 14 years old, not 12.
Rosie Ruiz: She won the 1980 Boston Marathon, but it was later discovered she had run only about a mile of the 26.2-mile course.
Chinese gymnastics: The team had to give back its bronze medal after it was discovered Dong Fangxiao was two years short of the minimum age of 16.