The NBA is approving Mark Cuban's sale of a majority stake of the Dallas Mavericks. Cuban is selling the stake to casino owner Miriam Adelson, who is also one of the richest people in the world. Forbes listed Adelson as the 35th-richest this year with an estimated net worth of $32.3 billion. As part of the unique sale agreement, Cuban will retain control of basketball operations for the Mavericks as well as shares in the team. The deal is expected to be finalized this week.