Why the CFTC Is Pushing Kalshi and Polymarket Off Injury Bets

Polymarket withdrew its self-certification for NFL player-availability contracts around August 31, 2026, after the CFTC asked the company to refrain from offering them, according to trade press coverage of the filings. Kalshi initially kept comparable "will player compete" markets live before also pulling its athlete injury-duration contracts around September 1, 2026, after a CFTC source told Sportico the agency had made the same request of Kalshi.

The contracts had drawn real trading interest before they came down. Sportico reported the injury-duration markets on Kalshi had attracted at least hundreds of thousands of dollars in wagers on the health status of players including Luka Doncic, Anthony Edwards, and Malik Nabers.

Neither withdrawal was compelled by a formal CFTC order, an emergency action, or a completed rule. Both companies' filings describe the removals as voluntary responses to informal CFTC outreach, a distinction that matters because it means the agency reached this outcome without having to invoke any of its formal enforcement tools.

That informality is itself notable. It shows the CFTC's staff-level supervisory leverage over designated contract markets can move faster than its own rulemaking process, even on a question the agency has not yet finished writing a rule to answer.

On June 10, 2026, the CFTC issued a 267-page notice of proposed rulemaking that would amend Rule 40.11 to add a three-part public interest test for event contracts: whether a contract involves an excluded commodity, whether it involves an enumerated activity such as gaming or unlawful conduct, and whether listing it would be contrary to the public interest. The proposal treats player-injury contracts, officiating-decision contracts, discrete in-game action contracts, and pre-collegiate sports contracts as likely contrary to the public interest, while leaving season-long statistics and final-score contracts on objective league data generally untouched.

The Federal Register published the proposal on June 12, 2026, with a 45-day comment window that closed July 27. A final rule, if adopted along the lines proposed, would take effect 60 days after publication, formalizing a bar on injury contracts that Kalshi and Polymarket have now effectively adopted on their own ahead of any final Commission vote.

A contract on whether a specific player will be active, or how long an injury sidelines them, ties settlement to information that a small circle, team medical staff, coaches, and the player, controls well before the public does. That is a structurally different risk than a contract on a game's final score, which depends on competitive outcomes no single insider can fully dictate.

The NPRM's own reasoning, echoed by leagues that lobbied for the restriction, is that injury contracts create financial incentives tied to athlete health with no objective, league-verified standard for when an injury actually occurred or how long it will last, the same core-principle concern that has driven the CFTC's separate review of mention markets.

The sequence, informal request first, formal rule later, suggests the CFTC is comfortable managing manipulation risk in specific product categories through supervisory conversations with registrants rather than waiting for a rule to take legal effect. An exchange listing a contract type flagged in a pending NPRM should not assume it can keep trading simply because the rule has not been finalized.

For any operator with a contract category resembling the ones the June NPRM singles out, officiating decisions and discrete in-game actions among them, the Kalshi and Polymarket injury-market withdrawals are a signal that voluntary compliance ahead of a final rule may be the path of least resistance, rather than waiting to be told formally.