The United States Anti-Doping Agency has filed a court action in Houston seeking to compel a deposition from an endocrinologist being investigated for possibly providing banned substances to track and field athletes.
The activities of the endocrinologist, Jeffrey S. Brown, are being examined as part of a continuing investigation by Usada of the prominent Nike coach Alberto Salazar, a person familiar with the investigation said Tuesday, on the condition of anonymity because he was not authorized to speak publicly.