Giambi announced Thursday he would cooperate with the steroids investigator and publicly admitted for the first time that he had a "personal history regarding steroids." He will become the first active player known to speak with the former Senate majority leader.

No date was set for their session. The former American League MVP said he wouldn't implicate other players and appeared to backtrack on earlier remarks that the sport owed fans a collective apology for the steroids era.

"I alone am responsible for my actions and I apologize to the commissioner, the owners and the players for any suggestion that they were responsible for my behavior," Giambi said in a statement.