Ben Johnson is a Canadian former sprinter,. former being the operative word when he admitted for performance enhancing drugs when he ran a world record in 1987.
Marion Jones is an American former world champion track and field athlete and also former professional basketball player, before many of her accolades were stripped from her.
Nadzeya Ostapchuk is a Belarusian shot putter who was briefly designated the Olympic Champion in 2012 but was stripped of the title for failing a drug test.
Roy Jones Jr is an American former professional boxer who competed in boxing from 1989 to 2018 and tested positive for the testosterone precursor androstenedione.
Sun Yang is a Chinese Olympic and world record holding competitive swimmer , until 2020 when he was banned for 8 years
Tyson Gay is an American track and field sprinter who competes in the 100m and 200m races.
Lance Armstrong is an American cyclist who was the only rider to win seven Tour de France titles despite later being stripped of his titles after an investigation revealed that he was the key figure in a wide-ranging doping conspiracy while he was winning his events.