Selig watched Bonds' 756th homer on television last night, then met with Mitchell today before returning to Milwaukee, a person with knowledge of Selig's whereabouts said. The person spoke on condition of anonymity because he wasn't allowed to discuss the situation publicly.

Bob DuPuy, baseball's chief operating officer, also was part of the session.

Mitchell said in May that his probe was in its "final phases," but he has not publicly stated a timetable for issuing his report.

Selig was in San Diego on Saturday night when Bonds hit his 755th home run to tie Hank Aaron's record, but he left California the following day and is not in San Francisco for the Giants' series against the Washington Nationals.

In Selig's absence, baseball was represented at Tuesday night's game by executive vice president Jimmie Lee Solomon and Hall of Famer Frank Robinson, a special assistant in the commissioner's office.

Selig had said last month that he planned to meet with Mitchell to discuss his view of steroids in baseball.

Mitchell declined comment today. The former Senate majority leader was hired by Selig in March 2006.