I am not US, but based on this comment: "The Clippers sale would easily beat the previous high price for an NBA team—the Milwaukee Bucks at $550 million earlier this year." I have to ask WHY?
10% of his worth is a huge amount to pay for something where your paying a premium, and its not likely to go up in value compared to other things he could buy.
Maybe its the billionaire version of a mid life crisis and convertible?