The National Football League has formally thrown its weight behind New Jersey state officials in their high-stakes legal battle over sports betting on prediction market platforms, urging the United States Supreme Court to take up the case and settle a rapidly escalating regulatory turf war.
In an amicus brief filed with the nation’s highest court on Wednesday, the NFL called upon the justices to grant a petition for a writ of certiorari filed by New Jersey Attorney General Jennifer Davenport and gaming enforcement interim director Mary Jo Flaherty. The filing represents a major escalation in the ongoing legal confrontation between state gaming regulators and federally regulated prediction market platforms, most notably Kalshi. At the core of the dispute is a fundamental question of jurisdiction: whether the oversight of event contracts tied to sporting outcomes falls properly under state gaming authorities or federal financial regulatory agencies.
The professional football league’s filing signals strong alignment with the core arguments advanced by New Jersey authorities. Specifically, the NFL emphasized that the case brings to light critical issues surrounding the classification of sporting-event contracts on prediction market platforms as financial "swaps." According to the league, Supreme Court intervention is urgently required to preserve the integrity of professional sports competitions and to provide adequate protections for everyday consumers who participate in these financialized prediction markets.
Highlighting the massive scale of public engagement with these platforms, the NFL cited striking market data in its brief. Figures included in the filing revealed that on the very first Sunday of the recent professional football season, more than half of the total trading volume across all major prediction markets was directly tied to NFL games. Out of a staggering $3.3 billion in total trading volume recorded that day, approximately $1.8 billion centered specifically on professional football events.
This immense volume of financial speculation on athletic performance underscores the league’s growing anxieties. According to the NFL, many of the sporting event contracts offered on Kalshi and competing platforms are inherently susceptible to market manipulation or can be characterized as fundamentally objectionable.
The league’s amicus brief elaborated on these specific vulnerabilities, pointing out that prediction market bets pose severe and direct threats to the perceived and actual integrity of athletic competition. Because many of these contracts can be heavily influenced or manipulated by a single individual, the risks are magnified—especially if critical insider information is known in advance. The filing noted potential scenarios where an individual player might alter their on-field performance, a team coach might make tactical changes to a lineup, or a game official could intentionally make or withhold specific calls to influence the financial outcome of a prediction contract.
Another central issue raised by the league is what it described as a dangerous lack of sensible safeguards governing these event contracts from the Commodity Futures Trading Commission. The NFL argued that attempting to federalize the regulation of sports betting through financial market regulators, rather than preserving traditional oversight by individual state gaming authorities, creates a massive legal and regulatory void. The league maintained that this division of authority constitutes a major question of national importance that the Supreme Court must ultimately address and resolve.
As of Thursday, the Supreme Court has not yet announced whether it intends to grant a review of the case. Meanwhile, the legal timeline has already begun to shift; Kalshi was recently granted a formal extension to respond to the initial New Jersey filing. The platform now has until November 9 to formally address the complex array of issues raised by state regulators, including questions of regulatory jurisdiction, the manipulable nature of specific event contracts, and overarching consumer protection concerns.
States Want Clarification From SCOTUS on Prediction Markets
The NFL is far from alone in its urgent call for judicial clarity. On the same day as the football league’s filing, a massive coalition consisting of 39 US states and the District of Columbia submitted a joint amicus brief strongly supporting New Jersey’s position. This broad collective of state officials argued that the ongoing jurisdictional conflict between the Commodity Futures Trading Commission and state-level gaming authorities has devolved into an unruly national turf war. In their view, this chaotic regulatory landscape has created an untenable environment that cannot possibly be resolved without definitive guidance and a binding answer from the Supreme Court.
The multi-state filing warned that delaying judicial intervention would only allow the existing federal-state regulatory dispute to escalate further. The brief pointed out that the ongoing power struggle between individual states and federal regulators highlights deep unpredictability regarding which laws apply and to whom they pertain. Whether through this specific legal challenge or through one of the many similar cases certain to wind their way through the judiciary, the coalition urged the Supreme Court to step in, resolve the widening circuit split, provide much-needed guidance to lower courts, clearly define the true limits of the CFTC’s statutory authority, and deliver a badly needed resolution to the central question presented.
Industry actors, however, are pushing back against the prospect of fragmented oversight. Following the initial filing by New Jersey authorities in September, Kalshi spokesperson Dani Lever told Cointelegraph that the prediction market platform cannot realistically operate under the thumb of 50 different state-level regulators.
Whether the Supreme Court justices will ultimately decide to wade into the complex and fast-evolving world of prediction markets remains uncertain. Although New Jersey officials were the first to formally petition the high court to review the Kalshi litigation, numerous other state-level actions have been initiated against prediction market companies across the country, ensuring that related legal challenges will continue to loom large on the horizon regardless of the immediate outcome of this petition.
Crypto Regulation & Policy
Crypto Regulation & Policy
Crypto Regulation & Policy
