NEW YORK — The NBA is banning some bets this season, including parlays on a player’s "under" statistics, the bet that turned up in the Jontay Porter and Terry Rozier cases. The ban is in a league memo sent to sportsbooks Friday, ESPN reported. “There’s a balance between ensuring that we are removing problematic bet types but also ensuring that we don’t just move activity into the illegal ...

The Sacramento Kings' Domantas Sabonis battles for a rebound against the Toronto Raptors' Jordan Nwora and Jontay Porter during the first half at the Scotiabank Arena on Wednesday, March 20, 2024, in Toronto.

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NEW YORK — The NBA is banning some bets this season, including parlays on a player’s "under" statistics, the bet that turned up in the Jontay Porter and Terry Rozier cases.

The ban is in a league memo sent to sportsbooks Friday, ESPN reported.

“There’s a balance between ensuring that we are removing problematic bet types but also ensuring that we don’t just move activity into the illegal market,” NBA executive vice president Scott Kaufman-Ross told ESPN. “And where we landed right now, we think, is the right balance of those two objectives.”

Partner books like DraftKings and FanDuel also can’t offer bets on who wins the opening tip, on players missing specific shots or on unders for players expected to play fewer than 12 minutes. They also lose alternate lines on unders with bigger payouts.

“Seeing where we may have had issues in the past is one of the inputs to determining the types of things that we think could be problematic,” Kaufman-Ross said.

The memo came days after Las Vegas bettor Shane Hennen pleaded guilty in federal court in Philadelphia. He admitted to charges tied to fixing schemes in the Chinese Basketball Association and NCAA, and to using nonpublic information to bet on NBA games in the Brooklyn federal case that involves Rozier.

Rozier has pleaded not guilty. Hennen’s sentencing is set for Feb. 25, 2027. Separately, prosecutors said three defendants in the Malik Beasley case plan to plead guilty. Beasley and former NBA player Ed Davis have not taken deals.

In a separate memo to teams Friday, the league said retired FBI agent and former NFL star Charles Tillman will run in-person training on betting rules. It is also expanding its AI-based monitoring of unusual betting and adding a text hotline for reporting harassment by bettors.

The NBA says its partner sportsbooks handle upward of 99% of the U.S. betting market. Kaufman-Ross said enforcing the rules on prediction markets, where the league has no formal partnerships, could be challenging.