Athletics coach Alberto Salazar, who has guided star Olympic athletes such as Mo Farah and Galen Rupp, has been slapped with a four-year ban after being found guilty of doping violations.
The decision to ban the 61-year-old from the sport comes after a four-year investigation by the United States Anti-Doping Agency and prolonged battle behind closed doors.
USADA also said Jeffrey Brown, a Texas endocrinologist who treated many of Salazar's athletes, has also been given a four-year suspension.
In announcing the bans, USADA praised the athletes for speaking out.
"The athletes in these cases found the courage to speak out and ultimately exposed the truth," said USADA chief executive Travis Tygart.
"While acting in connection with the Nike Oregon Project, Mr. Salazar and Dr. Brown demonstrated that winning was more important than the health and wellbeing of the athletes they were sworn to protect."
USADA said in the statement that two, three-member arbitration panels had determined Salazar and Brown should be banned for "orchestrating and facilitating prohibited doping conduct."
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