BUFFALO — A Canadian doctor whose high-profile clients have included Tiger Woods and Alex Rodriguez pleaded guilty in federal court yesterday to bringing into the United States unapproved drugs, including human growth hormone, that were used to treat professional athletes.

Dr. Anthony Galea, a healing specialist from Toronto who was sought out by the biggest names in sports, was indicted by a federal grand jury in October on charges that he smuggled human growth hormone and other substances into the United States and lied to border agents to avoid getting caught. He faces similar charges in Canada.

Most of the U.S. charges were dismissed with Galea’s plea, and he agreed to cooperate with investigators and disclose the identities of his patients and their treatments.

The indictment did not identify any clients.