Alex Rodriguez declined comment on his pending meeting with federal investigators probing a Canadian physician.
The New York Yankees third baseman is scheduled to meet with officials Friday in Buffalo, N.Y.
"Just baseball questions," Rodriguez said before Wednesday night's game against Washington. "I have nothing to add."
A-Rod was in Wednesday's lineup and said he would definitely play on Thursday. He didn't answer when asked about his playing for Friday.
The interview session Friday likely will include FBI agents and members of other federal agencies. Rodriguez said March 1 he had been contacted by investigators and intended to co-operate.
Dr. Anthony Galea said during a March 8 interview with The Associated Press that he treated the Yankees third baseman last year and prescribed anti-inflammatories but never gave him or any other athlete human growth hormone.
Other major leaguers, including the Mets' Jose Reyes and Carlos Beltran, have been contacted by federal investigators about Galea.
Colorado closer Huston Street has said investigators might want to talk to him about the case. Reyes and Beltran have said they did not receive HGH from Galea.
Galea, who also has treated golfer Tiger Woods, was charged by Canadian authorities in December with selling an unapproved drug known as Actovegin. He also was charged with conspiracy to import an unapproved drug, conspiracy to export a drug and smuggling goods into Canada by the RCMP.
Galea was arrested Oct. 15 after a search warrant was executed at the Institute of Sports Medicine Health and Wellness Centre near Toronto.
Vials and ampoules containing HGH and Actovegin, a drug extracted from calf's blood, were found in a car driven by Mary Anne Catalano, according to the RCMP and U.S. Federal Court documents. Catalano told American authorities at the border in Buffalo that she knew the drugs were illegal and that she was transporting them for her employer.
Galea told the AP during the March 8 interview that Catalano was carrying only a minuscule amount of HGH and that it was for his own use.