Marion Lois Jones, also known as Marion Jones-Thompson, is an American former world champion track-and-field athlete and former professional basketball player. She won three gold medals and two bronze medals at the 2000 Summer Olympics in Sydney, Australia, but was later stripped of her medals after admitting to steroid use.

Track and field is a sport that includes athletic contests based on running, jumping, and throwing skills. The name is derived from where the sport takes place, a running track and a grass field for the throwing and some of the jumping events. Track and field is categorized under the umbrella sport of athletics, which also includes road running, cross country running and racewalking. In British English the term "Athletics" is synonymous with American "Track and Field" and includes all jumping events.