Rodriguez and other high profile baseball players have been contacted by U.S. federal investigators regarding Galea. Rodriguez said last week he was "aware" of the investigation and plans to cooperate with the government.
Galea faces drug charges in Canada and his assistant was stopped last year trying to bring HGH over the border into New York state.
Galea told The Associated Press on Monday that he treated the Yankees star for his hip, which was "inflamed." But Galea says he has never given HGH to any athlete and Rodriguez was given anti-inflammatories.