The league wants the justices to weigh in on who regulates sports event contracts: the answer could change how you trade on games for years to come.

The biggest legal battle over sports trading just got a big boost. On Thursday, the NFL filed a brief urging the Supreme Court to hear New Jersey’s appeal in its dispute with Kalshi. The league’s position, for now, is that states are better suited to regulate sports event contracts than federal regulators.

The numbers tell the story behind the filing. On the season’s first Sunday, $1.8 billion of the $3.3 billion traded across all prediction markets was tied to pro football, according to the brief. That’s more than half.

Its wish list is specific: a minimum trading age of 21 (versus 18) plus a ban on contract types viewed as integrity threats. It also questions whether the 543-employee Commodity Futures Trading Commission can police everything. The CFTC responded by pointing out that the league had declined to sign an information-sharing agreement with the agency. Kalshi says market integrity is its top priority.

A Split That Could Only Be Settled by the Justices

The Third Circuit ruled in favor of Kalshi in April. Two other federal appeals courts have since ruled the other way: the Ninth (which covers California) at the end of August, then the Sixth on Sept. 25.

Lawyers call it a circuit split, which is often a signal that the Supreme Court is going to get involved.

The Ninth Circuit ruling hits close to home if you’re in Los Angeles. California has yet to legalize sports betting, but federally regulated prediction markets still operate here.

How the Trading Works in Reality

Everything boils down to whether a sports event contract is a financial product or a bet. You can see the difference spelled out clearly at Sportsbook Review, which has a regularly updated Kalshi promo code page detailing how the platform works.

The current offer (as of Oct. 9) runs on code SBR35. Deposit at least $10, then trade $25 within seven days of signing up; you’ll get $35 in bonus funds. They expire after a week and can’t be withdrawn. You’ll have to be 18 or older.

Underneath the code is the more interesting material. It explains that Kalshi is regulated by the CFTC as a designated contract market. Sportsbooks answer to state gaming commissions. That’s the distinction behind New Jersey’s appeal. You trade against other users rather than a house and can sell a position before the end of the game. There’s also a plainspoken breakdown of fees (they peak on contracts priced near 50 cents).

Beyond that, you’ll find a state-by-state availability table and a log of recent legal news, from the Sixth Circuit ruling to New Jersey’s petition. Responsible trading tools are covered as well, including deposit limits and self-exclusion.

That’s exactly what you need right now – rulings are coming down state by state. Having the terms and the latest legal news in one place can help you read each headline in context. It can also help you decide whether trading is for you at all.

Why Bruins Are Watching Closely

College sports have their own skin in this game. Back in January, the NCAA urged federal regulators to pause college markets until stronger safeguards were in place, from age limits to stricter integrity monitoring.

The push for a 21-and-over trading age has obvious ramifications on campus. If you’re among the many Bruins aged from 18 to 20, you can trade today… But you wouldn’t be able to, under the rules the NFL and NCAA want.

Saturday games trade much like Sunday games. A matchup such as UCLA’s ranked showdown at Oregon is the kind the NCAA has in mind; it wants a say over which college markets get listed.

And Sundays carry weight in Westwood, too. Former Bruin walk-on Carson Schwesinger was named NFL Defensive Rookie of the Year in February; he’s one of 19 former Bruins to make opening-week rosters. So when the league talks about protecting the game, it’s talking about players you once cheered at the Rose Bowl.

What Comes Next

Two tracks are running simultaneously. Kalshi has until Nov. 9 to respond to New Jersey’s petition. By Thursday, there were already 10 friend-of-the-court briefs on the docket, including one from Ohio and 38 other states (plus the District of Columbia). One Supreme Court expert told Front Office Sports they expect January to be the earliest the justices would decide whether to take the case.

At the same time, the CFTC is drafting its own rules. In June, it proposed a framework for reviewing event contracts that would define “gaming” in its regulations for the first time. According to the proposal, listed contract types went from over 220 in 2021 to over 8000 by May 2026. Kalshi argues the rulemaking already addresses many of the NFL’s concerns.

So keep an eye on Nov. 9. What follows will decide whether the next kickoff you trade on answers to Washington or Sacramento.