Marion Lois Jones (born October 12, 1975), also known as Marion Jones-Thompson, is an American former world champion track and field athlete and a former professional basketball player for Tulsa Shock in the WNBA. She won three gold medals and two bronze medals at the 2000 Summer Olympics in Sydney, Australia, but was later stripped of the titles after admitting to steroid use. Jones did retain her three gold medals as a world champion from 1997 and 1999.
At the time of her admission and subsequent guilty plea, Marion Jones was one of the most famous athletes to be linked to the BALCO scandal. The case against BALCO covered more than 20 top level athletes, including Jones's ex-husband, shot putter C.J. Hunter, and 100 m sprinter Tim Montgomery, the father of Jones's first child.