America's reigning 5,000-meter track champion, Shelby Houlihan, is back from a four-year doping ban.

Two-time Olympic finalist Erriyon Knighton was banned for four years in a doping case of an anabolic steroid.

The doping case involving U.S. sprinter Erriyon Knighton’s claims of eating contaminated meat is being appealed and will be sent to the Court of Arbitration for Sport.

China is trying to fight fire with fire in the face of persistent doping allegations that have dogged its swimmers at the Paris Olympics.

Armand “Mondo” Duplantis broke his own pole vault world record Monday night at the Olympics, clearing 6.25 meters (20 feet, 6 inches) to cap his second straight gold-medal performance on the sport’s biggest stage.

Erriyon Knighton became one of the great teenage sprinters of all-time. Now, as a 20-year-old, he sets sail on the Paris Olympic cycle.

Gabby Thomas held off Sha’Carri Richardson with the best time in the world this year to win the women’s 200 meters at the U.S. track and field championships.

Erriyon Knighton reacts to his performance in the men’s 200 final.

Allyson Felix is headed to her fifth Olympics.

The reigning world champion will get his first shot at winning Olympic 200m gold.

Noah Lyles won the 200 meters at the U.S. track and field trials, earning a spot on the Olympic team.

Erriyon Knighton, a 17-year-old from Florida, turned in the fastest time in the semifinal round of the 200 meters at the U.S. Olympic track and field trials.