The NBA will freeze out unauthorized sportsbooks from accessing the league's official data feed before game 1 of the NBA finals next week. 

Sportsradar, a data distributor for the NBA, sent a letter notifying sportsbook operators that they would "cease providing to you NBA Official Data for use in the United States unless and until you are an Authorized Gaming Operator of the NBA."

The NBA data feed is used by sportsbooks to run live betting options throughout the game. 

The league has partnered with MGM, FanDuel, and The Stars Group as their 3 official sportsbook partners with access to their data feed.