The NBA, in reaction to the arrests of Miami guard Terry Rozier and Portland coach Chauncey Billups last week for their alleged role in gambling schemes, has started a review of how the league can protect not just the integrity of the game but its players and coaches as well.

The league made those revelations in a memo sent to all 30 teams, a copy of which was obtained by The Associated Press.

“Given the spread of legal betting to the majority of U.S. states, the recurrence of integrity issues across sports, and the emergence of novel betting formats and markets, this is an opportune time to carefully reassess how sports betting should be regulated and how sports leagues can best protect themselves, their players, and their fans,” read the memo, sent by the NBA’s legal department.

Meanwhile, the quest for answers has reached lawmakers in Washington with the Senate on Monday following a request from a House committee last week in asking the NBA for information.

Sen. Ted Cruz, the Republican chairman of the Commerce Committee, and Sen. Maria Cantwell, the top Democrat on that panel, want information “about how the NBA investigated and handled these allegations as well as what steps the Association is taking to maintain the public’s trust.”

Their specific questions revolve around why the league’s probe of Rozier and the events surrounding a March 23, 2023 game when he was with the Charlotte Hornets.

“This Committee needs to understand the specifics of the NBA’s investigation and why Rozier was cleared to continue playing basketball,” Cruz and Cantwell wrote. “This is a matter of Congressional concern. The integrity of NBA games must be trustworthy and free from the influence of organized crime or gambling-related activity. Sports betting scandals like this one may lead the American public to assume that all sports are corrupt.”

They asked Commissioner Adam Silver to provide answers by Nov. 10.

Two indictments were unsealed last week and nearly three dozen people — most notably, Billups and Rozier — were arrested by federal officials.

Rozier was arrested because federal officials allege he conspired with associates to help them win bets based on his statistical performance in that March 2023 game. The charges are similar to what former Toronto player Jontay Porter faced before he was banned from the league by Silver in 2024.

Sportsbooks detected unusual patterns of wagers on the Charlotte game in question — prop bets involving Rozier were flagged and immediately brought to the NBA’s attention — and the league probed the matter but did not find enough evidence to conclude that Rozier broke any rules.

“While the unusual betting on Terry Rozier’s ‘unders’ in the March 2023 game was detected in real time because the bets were placed legally, we believe there is more that can be done from a legal/regulatory perspective to protect the integrity of the NBA and our affiliated leagues,” the league told its teams. “In particular, proposition bets on individual player performance involve heightened integrity concerns and require additional scrutiny.”