Kalshi Removes NFL Player Availability Contracts Days After Listing, Echoing Polymarket Withdrawal

Kalshi listed event contracts on whether individual NFL players would take the field in Week 1. By the next day the category had disappeared from the platform with no public announcement. The Commodity Futures Trading Commission filing for the product remains posted, and the contracts had been scheduled to run until Sept. 15.

The contracts resolved yes if a player took at least one snap, even if the play was nullified by penalty. A player listed as active who never appeared resolved no, with listed reasons including injury, suspension, voluntary withdrawal, visa denial, illness or personal reasons. As of Tuesday, 19 of the 23 players covered by Kalshi contracts also appeared on ESPN’s NFL injury list.

Parallel Regulatory Pressure on Polymarket

Polymarket filed its first NFL player-availability contract on Aug. 25, asking whether Patrick Mahomes would participate in the Kansas City Chiefs’ Week 1 regular-season game. It pulled the contract the following day. A Polymarket source told ESPN that the CFTC had asked the company and other operators to remove this specific type of contract. An exchange files a product with the CFTC and lists it unless the agency objects, though the commission can later open a review and prohibit contracts it finds contrary to the public interest. It took that step with Kalshi’s election contracts in 2023.

Neither platform described the products as injury markets, which are barred at legal U.S. sportsbooks. The distinction is material because the CFTC’s proposed rules for event contracts would ban those that explicitly settle solely by reference to the duration, severity, occurrence or medical diagnosis of an injury sustained by a specific athlete. The commission cited perverse financial incentives that could encourage physical harm to athletes, settlement dependent on confidential medical information that insiders could leak, and the absence of a sufficiently objective, verifiable and manipulation-resistant basis for settlement.

The NFL previously asked the CFTC to prohibit contracts tied to injuries. In April the players’ associations of all five major professional sports leagues jointly told the CFTC that negative contracts on whether an athlete is injured or penalized should be banned.

The CFTC’s Emerging Boundary on Athlete Contracts

This sequence shows the commission moving quickly against contracts that track individual player participation when those contracts overlap heavily with injury reporting. Operators offering event contracts must now treat athlete-availability products as carrying immediate regulatory risk, particularly where settlement could turn on medical status or non-public information. The pattern suggests the CFTC will continue to narrow the field of permissible sports-linked contracts to those with clear, verifiable and non-sensitive resolution criteria.

Reporting: Gaming Today

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