NFL urges the Supreme Court to hear New Jersey's challenge to Kalshi's sports contracts

On the league's own count, $1.8 billion of the $3.3 billion in prediction market trading on the season's first Sunday involved NFL games ^[1]. That share is about 55% ^[19], leaving roughly $1.5 billion ^[20] for everything else traded that day. If the justices take the case, they decide who regulates most of a game-day Sunday's volume. The figures come from a party with a stake in the answer ^[14].

The league's brief argues that game integrity and consumer protections differ between state-licensed sportsbooks and federally supervised contract markets, and that state oversight is needed for both ^[4]. It is advocacy, and it creates no new federal rule ^[14]. The NFL is putting its integrity argument behind state regulators while its games account for the majority of prediction market volume, by its own figures ^[19].

The question in Flaherty v. KalshiEX is whether the Commodity Exchange Act stops states from applying sports gaming laws to event contracts on a CFTC-registered market ^[7]. New Jersey's September petition argues that Congress did not quietly displace long-standing state gaming controls when it defined swaps under Dodd-Frank ^[8]. Kalshi's position is that a designated contract market operates under an exclusive CFTC framework, so federal oversight occupies the field ^[9].

Three appeals courts have taken different approaches to state gaming authority ^[17]. The split is less tidy than that count suggests. The Third, Ninth and Sixth Circuit cases involved different parties, procedural stages and state laws ^[13], which gives Kalshi room to argue the conflict is narrower than New Jersey describes.

The petition can go three ways. A denial ends it without a merits ruling ^[12]. If the Court grants and sides with Kalshi, the contracts stay under the CFTC framework Kalshi calls exclusive ^[9]. If New Jersey wins instead, its gaming law governs sports bets offered to people in the state ^[18]. Any grant runs on a separate briefing and argument timetable ^[12].

In my view the NFL's brief adds weight to New Jersey's petition without moving it procedurally, since the justices have given no indication that they support it ^[15]. The case for review is the league's own number. With about 55% of a first Sunday's trading on one league's games ^[19], the circuit disagreement covers the main product these exchanges sell on game days. I would be wrong if the Court denies the petition after Kalshi files, because a denial would show that the split, as these three courts drew it, was not enough to bring the case up ^[12].