The NBA is going all in on sports gambling. It just became the first American pro league to announce a deal with a casino and sports book operator. MGM Resorts International will be the league's official gaming partner. Sports betting is still illegal in most of the country. But in May, the Supreme Court opened the way for states other than Nevada to legalize it for the first time. That helped prompt the NBA-MGM partnership. The arrangement will allow MGM to use official NBA data feeds in its sports betting operations, along with the NBA and WNBA logos. The value of the deal was not disclosed. MGM CEO Jim Murren said the partnership would "revolutionize sports betting in the United States." He said the NBA data and logos will give bettors more confidence in the integrity of the wagering.