The NBA has officially approved the sale of the Boston Celtics to a group headed by private equity executive Bill Chisholm. The record-breaking deal values the Celtics franchise at $6.1 billion, making it the most expensive sale of an American professional sports team in history. The unanimous approval from the NBA's board of governors signals a smooth transition of ownership. Chisholm's group is expected to bring new investment and management strategies to the team, aiming to maintain the Celtics' competitive edge and further enhance the fan experience. This sale marks a significant moment in NBA history, reflecting the increasing value of professional sports franchises.