The NFL has asked the Supreme Court to review a ruling that Kalshi's sports-event contracts fall under exclusive federal oversight.

In its amicus brief filed on Thursday, the league contends that these contracts should be regulated under state gambling laws rather than federal law.

The NFL noted that contracts tied to NFL-related events accounted for $1.8 billion of the $3.3 billion traded across prediction markets on the season's opening Sunday.

The league seeks a ruling before the 2027 season and says that upholding federal jurisdiction would spur renewed efforts to strengthen integrity protections and consumer safeguards ahead of that season.