White and five others tested positive for the banned stimulant modafinil. Hammer thrower John McEwen tested positive for modafinil and the newly discovered steroid THG, and cyclist Adham Sbeih tested positive for the endurance-boosting hormone EPO.
The Colorado Springs-based USOC announced the test results after the substances were found in two urine tests from each of the athletes, and following a 30-day review of the tests by the U.S. Anti-Doping Agency.
All seven athletes are appealing their test results. Any suspensions or other sanctions would come only after those appeals are exhausted.