The NBA is investigating whether Kawhi Leonard received off-the-books money through an endorsement deal to help the Clippers circumvent the salary cap.
https://www.foxnews.com/sports/major-nba-trade-wont-be-official-until-leagues-investigation-into-teams-salary-cap-accusations-complete
https://www.foxnews.com/sports/major-nba-trade-wont-be-official-until-leagues-investigation-into-teams-salary-cap-accusations-complete