New York ? Lawyers for the baseball players’ union and the commissioner’s office are discussing ways to bring about a meeting between Jason Giambi and steroids investigator George Mitchell.

The talks were expected to extend into the weekend and possibly next week, a person familiar with negotiations said Thursday, speaking on condition of anonymity because of the sensitive nature of the discussions.

Baseball commissioner Bud Selig said June 6 that he wanted Giambi to meet with Mitchell within two weeks and to cooperate fully with the steroids investigation. Selig threatened to discipline the New York Yankees designated hitter following published remarks by Giambi that seemed to be an admission of steroids use. Selig said he would take Giambi’s cooperation with Mitchell into account in determining discipline.