NFL Files Brief in New Jersey Supreme Court Case

NFL's amicus brief in New Jersey Supreme Court case widens sport authority split

Three major professional sports leagues have now signed data-sharing and integrity agreements with Kalshi and Polymarket. The NFL has filed an amicus brief in the opposing direction, arguing before the U.S. Supreme Court that sports-event contracts are gambling instruments, not financial swaps, and that states retain authority to regulate them. That is not a minor procedural disagreement. It is a direct challenge to the legal architecture on which the prediction market industry's federal preemption argument rests.

The NFL's position — that the CFTC's jurisdiction does not displace state gambling law for sports-event contracts — mirrors the argument New Jersey Attorney General Jennifer Davenport brought to the Supreme Court after the Third Circuit ruled against the state. The NFL's decision to enter that case as amicus is a signal that the league views the Third Circuit ruling as a live threat, not a settled matter.

The NBA's agreements with Kalshi and Polymarket do the opposite work. By negotiating intellectual property rights, official data feeds through Sportradar, and integrity protocols that include trading prohibitions for league and team personnel, the NBA has constructed a compliance architecture that looks, deliberately, like the framework a federal regulator would design. The CFTC memorandum of understanding with the NBA reinforces that framing. The league is not simply licensing its brand. It is placing itself on the federal side of the jurisdictional line.

This matters for the preemption argument in ways that have not received enough attention. Federal preemption under the Supremacy Clause operates through statutory displacement — a federal regulatory scheme can preempt state law only where Congress intended it to occupy the field, or where state law would obstruct a federal objective. The Commodity Exchange Act grants the CFTC jurisdiction over event contracts that are not contrary to the public interest. Whether sports-event contracts fall within that grant has never been resolved at the Supreme Court level. The Third Circuit said yes. New Jersey says no. The NFL's brief says the Third Circuit was wrong.

What the NBA's deal adds to the record is a cooperative regulatory posture — a major sports property operating within a CFTC-acknowledged framework rather than contesting it. That kind of industry behavior has historically weighed in preemption analysis, not as dispositive evidence, but as a factual backdrop that courts consider when assessing whether a federal scheme is functioning as intended. The NFL's litigation posture, by contrast, hands state regulators an argument that even the regulated industry's participants do not agree the federal framework should govern.

I think the market is underpricing how much the league split complicates the NFL's Supreme Court strategy. An amicus brief is most effective when it reinforces a clean legal principle. The NFL's brief arrives in a record where the NBA, MLB, and NHL have each chosen federal engagement over state-by-state negotiation. That does not defeat the NFL's legal argument, but it fragments the factual predicate the brief implicitly relies on — that treating sports-event contracts as federally regulated swaps is contrary to how the sports industry itself understands them.

The governing standard is whether the CFTC's event contract authority under Section 5c(c) of the Commodity Exchange Act is broad enough to occupy the field against state gambling enforcement, and whether the NBA's compliance framework constitutes evidence that the federal scheme is operational and coherent enough to sustain that preemption claim.