Private equity mogul William Chisholm agreed to buy the Boston Celtics on Thursday in a deal that values the NBA’s reigning champions and the most-decorated franchise in league history at a minimum of $6.1 billion US — the largest price ever for American professional sports team. If the deal is approved by the NBA’s board of governors this summer, the sale would top the $6.05 billion paid for the NFL’s Washington Commanders in 2023. A Massachusetts native and graduate of Dartmouth College and Penn’s Wharton School of business, Chisholm isRead more