NFL's second letter names specific plays as manipulation targets

Sabrina Perel sent the letter on a Thursday, one week before the 2026 NFL regular season opens. The timing was not accidental.

Perel, the league's Chief Compliance Officer, addressed it to prediction market operators including Kalshi and Polymarket. It was the NFL's second formal request of the year on the same subject. The first, sent in the spring, had produced no visible change in what the platforms listed. The contracts Perel identified as objectionable in the spring remained available when she wrote again in September.

The new letter is more specific than the first. Where the spring communication named categories — player injury status, fan safety, player misconduct — this one names plays. A kicker missing a field goal. A quarterback's first pass being incomplete. A receiver's first target dropped. A running back's first carry gaining fewer yards than a stated threshold. These are not game outcomes. They are individual moments, involving individual people, that a single participant could control.

That distinction matters more than it might appear. The NFL's integrity concerns about game-level contracts are familiar territory — leagues have raised versions of this argument against sports betting for decades. What Perel's letter adds is a specific theory of harm at the level of the play: that listing these contracts creates pressure on the person executing the action, not just on the outcome of the contest. A kicker who knows a contract resolves on whether he misses is in a different position than one who knows money rides on his team winning. The letter makes that case explicitly, stating that such listings create significant risks for players, coaches, and officials.

The league also flagged contracts tied to penalty flags and officiating decisions — a category with its own integrity logic, since a referee controls whether a flag is thrown in a way that a wide receiver does not fully control whether his first target is caught.

The consensus read on this dispute has been that the NFL's demands are leverage in a negotiation, and that prediction markets will eventually find a compliance structure that satisfies both the league and their regulators. That reading rests on Kalshi's MLB partnership as evidence of what accommodation looks like. But the MLB deal involves the league, not individual players. Nothing in Perel's letter suggests the NFL is interested in the same arrangement while play-level contracts remain listed. The second letter, identical in substance to the first but more granular in its examples, reads less like an opening position and more like documentation for a legal filing that has not yet been made.

Prediction markets are entering the NFL season having absorbed legal setbacks in Michigan, facing a Supreme Court petition from New Jersey, and managing regulatory pressure across multiple states. The NFL's second letter adds an institutional adversary that operates independently of those state processes and has its own standing to litigate. Whether Perel's documentation is preparation for that step is not on the public record.