In sports betting, official bets are based on statistics and other information obtained from the sport’s governing body. This form of betting is legal in most states, though there’s been a battle between the sports book industry and leagues over what data they should have access to.

The NHL doesn’t publicly take a stand for or against sports betting, but the Vegas Golden Knights were the first team to open its own sportsbook in Nevada and have signed partnerships with BetMGM resorts and William Hill. Several other NHL teams have in-house sportsbooks. Other teams, including the New York Yankees, have partnered with FanDuel and DraftKings to offer their own apps.

MLB has a few rules for its fans when placing wagers. The odds of a bet on a specific outcome must be officially announced before the bet is accepted or paid out, to protect the integrity of the game. In addition, a player, coach or any other team employee who places a bet on a game they have an obligation to play in could face disciplinary action from the league.

Before the Supreme Court ruling, some sports leagues were fighting to keep legalized gambling limited. ESPN’s David Purdum says that since the decision, those stances have completely changed, with many embracing it and partnering with sportsbooks. The NFL, for example, has ramped up its sports integrity efforts and hired extra security personnel. In addition, its contracts prohibit players from betting on games while at team facilities or on trips with their teams.