NFL pushes prediction markets to pull manipulable sports contracts

America’s NFL has urged prediction market operators, including Kalshi and Polymarket, to remove certain sports‑related contracts it believes pose risks to integrity.

In letters sent to the platforms, the league flagged markets tied to events that could be manipulated or known in advance, including those linked to injuries, officiating decisions, draft outcomes and broadcast mentions.

At the core of the NFL’s concerns are contracts outside typical sportsbook guardrails, where insider information could give some traders an unfair advantage.

NFL executive vice president Jeff Miller said leagues are wary of markets where “some people are going to have that information … that they can then share,” and wants to avoid wagers susceptible to manipulation.

The push comes amid broader scrutiny of prediction markets, which fall under the jurisdiction of the Commodity Futures Trading Commission and have expanded nationwide beyond traditional state‑regulated sports betting.