Developing The NFL Went Back to the Supreme Court Over Gambling and This Time It Is Not Asking for a Ban. Read What It Actually Wants

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The National Football League filed an amicus brief in the Supreme Court on Thursday asking the justices to take Flaherty v. KalshiEX, LLC, No. 26-299. The last time the NFL was in that building on this subject it was a plaintiff trying to keep sports betting illegal in New Jersey, and it lost. Its brief acknowledges this in a footnote — "The NFL was a Plaintiff–Respondent in Murphy alongside other leagues and the NCAA" — with the air of a man mentioning his first marriage.

The easy column writes itself from there. It is also wrong, or at least lazy, because the thing the league is asking for in 2026 is not the thing it asked for in 2018, and the difference is the entire story.

The number the league put in writing

Here is what the NFL told the Court about the size of this: on the first Sunday of this NFL season, more than half of all prediction-market trading volume — $1.8 billion out of $3.3 billion — was related to the NFL.

Sit with that for a second. Not half of sports volume. Half of all volume, on platforms that also run elections, interest rates, weather and box office. One league, one Sunday, 55 per cent of the entire asset class.

That figure is the brief's load-bearing beam, and it does two jobs. It establishes standing in the practical sense — the NFL is not a bystander lobbying about someone else's industry. And it quietly concedes the thing the league will never say out loud, which is that prediction markets are now a material distribution channel for interest in professional football.

What the brief does not ask for

The 2018 NFL wanted PASPA upheld. The 2026 NFL wants a regulator swapped. That is a much narrower ask, and the brief is unusually candid about the condition under which it would not care at all. Its own words: if the Commission and the exchanges "were to adopt the same robust safeguards and engage in the same vigorous oversight as state and tribal gambling regulators," then which body has jurisdiction "would be largely an arcane issue of regulatory jurisdiction."

That sentence is a settlement offer with a Supreme Court caption on it. The league is saying: we do not object to the product, we object to the rulebook. And then it lists what it asked for and did not get.

The prohibited-wagers list. The NFL requires its licensed-sportsbook partners to refuse certain bets — the ones the league believes a single person can move. A player can alter his own performance. A coach can change a lineup. An official can make or not make a call. The brief says the NFL has publicly urged the exchanges and the CFTC to adopt the same list, and "the DCMs and CFTC thus far have declined to do so."

The age floor. State regulators generally set 21. The brief says the league asked the Commission to match it and the Commission declined, leaving 18-year-olds able to trade sports event contracts. Then the sentence that will get quoted in every hearing room for the next two years: in almost every state, an 18-year-old "could not bet on a game through Caesars Sportsbook, but could bet on the same game through Kalshi."

The brief's examples of the contracts at issue are deliberately unromantic: whether the Washington Commanders make the 2026 playoffs, whether the Commanders beat the Cowboys in Week 18, whether CeeDee Lamb scores more than one touchdown in that game. The first is a market. The third is a prop bet with a different word on the ticket. The NFL's point is that nobody has yet explained which federal rule distinguishes them, and the answer so far has been that registration does.

Kalshi's answer, which is the best one available

Kalshi's response to Thursday, given to CoinDesk, is sharper than the usual statement: it says it has "consistently tried to engage proactively and constructively with the NFL to collaborate on market integrity with no response," and it points at its existing arrangements with Major League Baseball and the National Hockey League.

That is the strongest counterargument in the file and it deserves to be stated at full strength. If sports event contracts genuinely threaten competitive integrity, why have two other major North American leagues signed deals rather than briefs? Either integrity is not really the issue, or the NFL has concluded it can extract better terms through litigation than negotiation. The league's commercial position makes the second reading easy: the NFL has official sportsbook partners, official data agreements and a revenue line that depends on regulated betting. A rival channel that does not pay for official data and does not sign integrity agreements is a competitor before it is a threat.

We think that answer is good and insufficient, in that order.

It is good because the NFL's motives are obviously mixed and because a league that monetised the thing it spent two decades calling corrosive has forfeited the presumption of good faith. It is insufficient because motive is not an argument about statutory text, and because the two specific asks in this brief cannot be explained by commercial jealousy. A prohibited-wagers list costs the NFL nothing to demand and costs its own sportsbook partners real revenue — those partners are the ones currently refusing the bets. A minimum age of 21 does not advantage one distribution channel over another; it narrows every channel at once, including the prediction-market arms the league's own sportsbook partners have launched. The league is asking for two rules that bind its partners as hard as they would bind the exchanges. That is the part a pure-self-interest story does not explain.

And the MLB and NHL deals cut less cleanly than Kalshi suggests. Signing a monitoring agreement with an exchange is a judgment about risk management under the law as it currently stands. It is not a legal position on whether Congress preempted state gaming law in 2010. A league can believe both that it wants data-sharing with Kalshi tomorrow and that the Third Circuit got the Commodity Exchange Act wrong.

The ledger that makes this hard to take at face value

None of which earns the NFL a clean hearing, and the timing is almost comic. In the same season the league has gone to the Supreme Court to argue that gambling requires serious regulators, it fined Broncos guard Quinn Meinerz and receiver Jaylen Waddle $14,926 each for pantomiming a dice roll after a two-point conversion, classifying it as an illegal celebration and a vulgar act. Meinerz's explanation: "We were playing Yahtzee." He is appealing. A week later the league rescinded a $14,926 fine against 49ers fullback Kyle Juszczyk after concluding he had been miming a juice box rather than a beer — a reversal in which the league accepted his point about the Bud Light sponsorships surrounding its own broadcasts.

So the institutional position is: a mimed dice roll is a vulgar act, a mimed beer is fine if the sponsor is on the stadium, and $1.8 billion of unregulated-by-anyone-you-recognise volume on one Sunday is a matter for the Supreme Court. All three can be true. Only the third is serious.

What would change our view: if the Commission adopts a prohibited-wagers list and a 21 floor. There is a vehicle — the brief's authorities point at a June 12, 2026 Federal Register item at 91 Fed. Reg. 35,806, which the league cites three times. The NFL has told the Supreme Court that in that scenario the jurisdictional fight becomes arcane. We would hold the league to its own sentence.