The restrictions also cover bets on whether a player will miss a particular shot and parlays that combine multiple “under” wagers on one player. Sportsbooks will not be allowed to offer under bets involving players expected to play only a few minutes, according to league guidance.

The NBA also told teams that players, coaches and training staff must attend in-person instruction on the league’s sports-betting rules beginning this season. The restrictions are set to apply to WNBA games in 2027.

The new policies build on earlier limits on certain bets involving players on 10-day or two-way contracts, as well as wagers on turnovers, fouls and missed free throws. The league said it has developed an artificial-intelligence-based monitoring platform intended to flag and investigate unusual betting activity. The system analyzes factors including injury reports, social media and wagering patterns.

The changes come amid heightened scrutiny of gambling around professional basketball. In the past year, former Portland Trail Blazers coach Chauncey Billups, former Miami Heat guard Terry Rozier and former NBA guard Damon Jones were arrested in connection with alleged gambling operations. Federal officials alleged that Rozier conspired with associates to help them profit from bets tied to his statistical performance in a 2023 game. The allegations have not been established as fact in court.

The league also said it is strengthening protections for players facing threats or harassment tied to sports betting. Players will be able to opt into programs designed to identify and remove abusive social-media posts, and the NBA is revising its fan code of conduct to make clear that betting-related harassment is prohibited.

The restrictions target wagers tied to brief, specific moments or individual player performance—markets that can be vulnerable to inside information or manipulation. The league did not say how it would enforce the sportsbook limits in the memo details reported Friday.