The head of the U.S. Anti-Doping Agency told senators that Chinese swimmers would have had to ingest around 11 pounds, or five kilograms of food to test for the amounts of the performance enhancer that resulted in the much-debated positive drug tests from 2021 that were later disregarded.

The U.S. government did not pay the more than $3.6 million due to the World Anti-Doping Agency in 2024, making good on a long-running threat anchored in unhappiness with the global watchdog’s handling of cases involving Chinese swimmers and others.

Two former U.S. Olympic gold medalists say they've lost faith in the World Anti-Doping Agency to rid their sports of cheaters ahead of next month’s Summer Games in Paris.

Revelations of nearly two dozen Chinese swimmers whose positive doping tests went unpunished have sparked an intense flurry of accusations and legal threats between the World Anti-Doping Agency and the head of the U.S. drug-fighting organization.

A deal for Drug Free Sport International to police medication in horse racing is in place two months before the Horseracing Integrity and Safety Authority takes effect.

A summary of some key areas in collective bargaining between Major League Baseball and the Major League Baseball Players Association as of proposals through Feb. 24, as obtained by The Associated Press.

Major League Baseball and its locked-out players agreed to resume negotiations Saturday after an 11-day break.

Two people familiar with the sport’s Joint Drug Program tell The Associated Press that Major League Baseball has stopped testing players for steroids for the first time in nearly 20 years due to the expiration of the sport’s drug agreement.

The Horseracing Integrity and Safety Authority has released a draft of proposed anti-doping and medication control rules designed to bring uniformity to a sport that has operated for years under patchwork regulations in 38 racing states.

U.S. Anti-Doping Agency leaders are pushing to further mitigate “harsh consequences” for marijuana if it’s not intentionally used to enhance performance, though they cannot unilaterally change the rules, they wrote in a letter to members of Congress critical of the agency in the wake of sprinter Sha’Carri Richardson’s ban from the Olympics.