NFL backs New Jersey authorities in SCOTUS petition over Kalshi

The National Football League (NFL) largely sided with New Jersey officials in their petition for the Supreme Court to consider a case on sports bets through prediction markets platforms 

In an amicus brief filed with the US Supreme Court on Wednesday, the NFL called on the justices to grant a petition for a writ of certiorari from New Jersey Attorney General Jennifer Davenport and gaming enforcement interim director Mary Jo Flaherty. The filing came in response to New Jersey officials petitioning the court to consider its case against Kalshi, potentially resolving whether the jurisdiction of prediction market companies falls under state authorities or federal agencies.

The football league supported many of the New Jersey authorities’ arguments, including that the case addresses potential issues with labeling sporting-event contracts on prediction market platforms as “swaps” and that it should be reviewed to “preserve game integrity” and “protect customers.” The group cited data showing that on the first Sunday of the football season, “more than half of all prediction-markets’ trading volume,” about $1.8 billion of $3.3 billion, related to the NFL.

According to the NFL, many of the sporting event contracts on Kalshi and other platforms were “highly susceptible to manipulation” or “otherwise inherently objectionable.”