The NBA ownership carousel kept spinning on Tuesday, with private equity billionaire Tom Dundon agreeing to buy the Portland Trail Blazers for just over $4 billion from Paul Allen's estate. The league also approved Bill Chisholm's purchase of the Boston Celtics,

The sale price remains unclear, but Dundon's group includes Portland CEO Sheel Tyle and the collective intends to keep the team in Portland.

One of the NHL's more prominent owners has agreed to purchase the Western Conference NBA team in a move that could shake up the franchise.