Grousbeck and partner Steve Pagliuca led a group that purchased the Celtics in 2002 for $360 million. Franchise valuations have since skyrocketed, with the Phoenix Suns being sold for $4 billion to Mat Ishbia in February 2023, the Milwaukee Bucks being sold to Jimmy and Dee Haslam for $3.5 billion several weeks later, and the Mavericks being sold to the Adelson and Dumont families for $3.5 billion in December 2023. The Celtics are one of the iconic franchises in professional sports, with an NBA record 18 NBA titles — trailing only the New York Yankees (27) and Montreal Canadiens (24) among all North American professional sports leagues.