NFL lays out its case: $1.8B in football trading, "exploiting the gap"

The NFL is asking the Supreme Court to put sports prediction markets under state gambling oversight, pointing to what it says was $1.8 billion in football trading on the season’s opening Sunday. According to the New York Post’s October 8, 2026 report, the league’s amicus filing says football represented more than half of prediction-market volume that day.

A dispute over who sets the rules

The filing supports New Jersey’s challenge to an appellate ruling that effectively gave federal regulators precedence over states. According to the Post, bipartisan attorneys general from 39 states, dozens of Native tribes and the casino industry back the challenge. Federal appeals courts have reached conflicting conclusions about whether state or federal authorities should oversee these markets.

The NFL says it does not oppose prediction markets themselves. Its argument is that uncertainty surrounding designated contract markets leaves weaknesses in consumer protection and sports-integrity oversight that require Supreme Court clarification. The platforms currently operate under Commodity Futures Trading Commission oversight; critics argue that this structure lets operators avoid state gambling taxes and penalties while accepting sports wagers from users as young as 18. The league wants a minimum age of 21, matching standard sportsbook requirements.

Integrity concerns meet platform pushback

The NFL’s concerns extend beyond age limits. According to the Post, its filing describes how a kicker deliberately missing a field goal or a wide receiver intentionally fumbling a pass could influence particular contracts. Markets involving injuries and officiating also present insider-trading risks, the league argues.

Kalshi disputed that federal oversight is inadequate. A spokesperson told the Post that the company had repeatedly sought engagement with the NFL without receiving a response, and cited relationships with MLB, NHL and integrity partners. Kalshi also said the CFTC actively supervises sports markets, which it said are listed on nearly every US commodities exchange, and that ongoing rulemaking addresses many of the league’s concerns. Polymarket pointed to its surveillance tools and collaboration with the CFTC, SEC and other professional leagues, arguing for consistent federal standards rather than separate state regimes.

Sports partnerships remain divided

The leagues have not taken a uniform approach. The Post reported that MLB, Major League Soccer and UFC have agreements with Polymarket, while NHL works with both Polymarket and Kalshi. NBA, PGA and NFL have partnered with neither platform, and the NFL also prohibits advertising partnerships with them. NFL Commissioner Roger Goodell told CNBC Sport in September that protecting the game’s integrity mattered more than moving first.

The court fight sits alongside other enforcement disputes. New York Attorney General Letitia James has separately sued Kalshi and Polymarket, alleging illegal gambling operations. The platforms have grown rapidly since their US launches in July 2021 and December 2025, respectively, offering contracts spanning sports, pop culture and politics, according to the Post.

Insider-trading allegations have added scrutiny. In August, Kalshi imposed its first lifetime ban on former Rep. George Santos for allegedly earning more than $17,000 wagering on his own State of the Union attendance. This spring, federal prosecutors charged an Army officer over $400,000 earned through Polymarket trades allegedly using classified information about the operation to capture Venezuelan dictator Nicolás Maduro. Both platforms have announced insider-trading prevention policies, the Post reported.

What it means for prediction markets

• Regulatory jurisdiction is the central issue. New Jersey’s challenge seeks to overturn a ruling favoring federal authority; the NFL’s filing is an argument for that change, not a court decision.
• Access and operating requirements are at stake. State oversight could bring gambling taxes and stricter age requirements, including the 21-year minimum the NFL supports.
• Football represents substantial exposure. The NFL’s claimed $1.8 billion opening-Sunday volume underscores the importance of sports contracts to the broader market.
• Integrity safeguards remain contested. The NFL sees gaps in oversight, while Kalshi and Polymarket maintain that federal supervision and their own controls address those risks.