NFL Flags Integrity Concerns in Prediction Markets

The National Football League (NFL) is pushing back against sports-related prediction market products it says could invite insider trading and undermine confidence in outcomes that can be known ahead of time, including NFL draft selections. The league’s stance comes as federally regulated prediction markets such as Kalshi and Polymarket have expanded into sports propositions, allowing users to take positions on events like which player will be selected at a specific draft slot.

Officials have asked these platforms to stop offering contracts the NFL views as especially vulnerable to manipulation or prior knowledge. The league said such markets could create unfair suspicion around participants and damage the perceived integrity of events, particularly when the underlying result is determined before it becomes public.

The NFL’s concerns cover outcomes that can be known in advance, including draft picks and player signings, as well as markets tied to officiating and topics the league described as inherently objectionable, such as player injuries.

Former NFL General Manager Tom Telesco highlighted how widely sensitive information can circulate inside an organization before the public learns it. He said that 20 to 30 people within a team could know a draft pick 24 hours ahead of time. In the past, acting on that kind of information would have required illegal or offshore betting channels, but the league argues that prediction markets now enable anonymous wagering in a regulated setting, changing the risk profile for information misuse.

Trading activity around the upcoming draft has already drawn attention. Kalshi users have reportedly put about $2 million in stakes on the identity of the second overall draft choice. At the same time, the NFL said it is concerned about offerings that could be influenced by a single person, or where the outcome is effectively pre-determined within a small circle before it becomes public knowledge.

Despite the NFL’s request, the platforms have not changed their menus, continuing to list more than 100 draft-related propositions for investment. The league also pointed to differences in how these markets operate compared with traditional sportsbooks. Sportsbooks typically monitor betting patterns for suspicious activity and can report concerns to law enforcement, while prediction markets largely move prices based on trading volume.

Kalshi and Polymarket have said they work with integrity monitors, and Kalshi says it bars professional athletes and team personnel from trading on sports they are connected to. The NFL, which has disciplined players for gambling violations since the 2018 legalization of sports betting, said it is reinforcing compliance with its gambling policy and draft security measures.

A key uncertainty is whether existing monitoring and restrictions are sufficient for markets tied to outcomes that may be knowable in advance, even when trading occurs on regulated platforms.