There were concerns that he might not return after his contract was up, and his status in terms of health was unclear after a knee injury.

Further details of the Celtics sale, including more co-owners, were released by the team following approval from the NBA's Board of Governors.

The sale of the Boston Celtics has been finalized. Private equity mogul Bill Chisholm has taken control of the NBA’s most-decorated franchise from a group led by Wyc Grousbeck that had owned them for more than two decades.

The Celtics have made it official with the leadership structure between new governor Bill Chisholm and longtime owner Wyc Grousbeck.

Bill Chisholm has officially completed his $6.1 billion purchase of the Celtics from Wyc Grousbeck and is the team's new owner.