BUFFALO (New York): A Canadian doctor whose high-profile clients have included Tiger Woods and Alex Rodriguez was charged Tuesday with bringing unapproved drugs into the United States and unlawfully treating pro athletes.

Dr. Anthony Galea of Toronto, who is known for using a blood-spinning technique designed to speed recovery from injuries, is accused of injecting at least one current National Football League player with Actovegin, a calf’s blood derivative which is not approved by the Food and Drug Administration, and providing a retired player with human growth hormone after his playing days had ended.