Professional sports has been rattled by federal indictments involving illegal gambling schemes that accuse NBA and Major League Baseball players of manipulating their performances to set up fraudulent bets on nearly invisible nuances of games.

As leagues grapple with the fallout, one central issue is the availability of incremental bets within sporting events that do not depend on the game’s outcome and thus may be easier to manipulate.

Two NBA players, Jontay Porter and Terry Rozier, have been accused by federal prosecutors of planning to leave games early and sharing that information with bettors, who wagered on their underperformance. Porter, who was charged in 2024, pleaded guilty to wire fraud and has been banned from the league. Rozier was charged last month and has denied wrongdoi

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