The NFL is getting directly involved in one of the biggest legal fights facing prediction markets. The league filed a brief with the U.S. Supreme Court on Thursday, Oct. 8, supporting New Jersey regulators in their ongoing dispute with Kalshi over sports event contracts.
The NFL wants states to retain authority over sports trading, arguing that federal oversight currently lacks important consumer protections and safeguards for game integrity. With billions already moving through football markets, the league clearly doesn't want to wait around for the issue to sort itself out.
The NFL Wants States Back in Control
The filing supports New Jersey's request for the Supreme Court to review a federal appeals court decision favoring Kalshi. That ruling prevented New Jersey from enforcing its state gaming laws against Kalshi's sports contracts while the case proceeds. Kalshi argues that its contracts qualify as financial swaps regulated by the Commodity Futures Trading Commission.
The NFL disagrees, arguing that sports event contracts should remain subject to state authority. Federal appeals courts have reached conflicting conclusions, with the Third Circuit favoring Kalshi while the Sixth and Ninth Circuits have sided with state regulators. The NFL wants the Supreme Court to settle that disagreement.
Football is Already Driving Huge Trading Numbers
The NFL has plenty of reasons to pay attention. According to its filing, football-related contracts generated $1.8 billion in trading volume on the first Sunday of the 2026 season.
That represented more than half of the $3.3 billion traded across prediction markets that day. The league also pointed to several areas where it believes existing protections fall short.
Its concerns include:
- Contracts involving missed field goals or other easily influenced outcomes
- Markets tied to player injuries or misconduct
- Contracts involving officiating decisions
- Events where someone could know the outcome beforehand
- Minimum trading ages and access to nonpublic information
The NFL argues that these areas require stronger restrictions than prediction market platforms currently provide.
The Age Difference is Another Sticking Point
One issue the league keeps returning to is age requirements. Most state-regulated sports platforms require participants to be at least 21, while Kalshi allows eligible traders beginning at 18. That creates different rules for people participating in markets tied to the same football game.
The NFL wants the CFTC to adopt a minimum age of 21 for sports contracts. The league also questions whether the CFTC has enough resources to oversee the rapidly expanding number of contracts. It argues that state regulators already have established systems to monitor suspicious activity and work directly with professional leagues.
A Supreme Court Decision Could Change Everything
The NFL isn't simply asking for more restrictions. It wants clarity about which regulators have authority over sports prediction markets. If the Supreme Court agrees to hear the case, its eventual ruling could have major consequences for Kalshi and other platforms operating nationwide. For now, the league's filing adds another influential voice to an already crowded legal dispute.
The Trade Handle Prediction Markets Take
We've watched the NFL become increasingly vocal about prediction markets throughout 2026. This filing takes that involvement further. What's particularly interesting is that the league acknowledges stronger federal safeguards could reduce some of its concerns. Its objections aren't limited to which government agency oversees these contracts.
For prediction market operators, that distinction matters. Even if federal authority ultimately wins out, the industry's biggest sports partners may continue pushing for tougher protections. The NFL clearly sees how much trading activity football generates. Now it wants a bigger say in the rules governing that activity.