Sports Players Unions Are Pushing Back Against New Betting Markets

Five major North American sports players associations have sent a joint letter to the Commodity Futures Trading Commission asking for rules to restrict certain kinds of betting markets. The letter comes from the unions representing NFL, MLB, NBA, NHL, and MLS players.

What are they worried about? These unions want the government to ban bets on whether athletes will get injured or underperform. For example, they want to stop people from betting on whether the word "concussion" will be mentioned during a game broadcast. The unions sent this letter in response to the commission asking the public what it thinks about regulating these newer betting platforms, which include companies like Kalshi and Polymarket.

What Are These Betting Markets?

To understand the dispute, it helps to know how these platforms differ from traditional sportsbooks. Traditional sports betting — the kind you might place in a casino or on your phone with a licensed app — is regulated state by state and focuses mainly on outcomes: which team wins, what the final score will be.

These newer platforms work more like stock markets. Instead of betting on who wins, you can buy and sell contracts tied to specific events. Someone might bet that a particular player will fumble the ball, or that a specific statistic will or won't happen. The platforms argue they are trading event-based contracts, not just accepting bets.

This distinction matters legally. The commission that oversees commodity trading now has to decide whether these platforms should fall under its authority or whether they are really just sports betting that should be regulated by state gaming authorities.

Major Disagreements Among Leagues

Not all sports organizations have the same view. The NBA has asked for stricter rules, especially limits on whether players, coaches, and referees can participate in these betting markets. The league worries that inside information could be used to make unfair bets.

But other leagues have gone a different direction. The MLB, NHL, and UFC have actually signed deals with these betting platforms, sharing information in exchange for revenue. This split reflects a real disagreement about whether these markets are mostly a problem or mostly an opportunity.

What Comes Next

The Commodity Futures Trading Commission has received a lot of comments on this issue. Some people argue that prediction markets should face few restrictions because they help people trade on their predictions and gather information. Others say that sports leagues and players need protection from manipulation and from having their private information used against them.

The commission will eventually decide what rules these platforms have to follow. There is a genuine tension here that does not have an obvious right answer. Innovation in financial markets often comes before regulators catch up, and the rules eventually written always disappoint someone. The question is not whether there should be rules, but which risks matter most — the risk that these markets harm professional sports, or the risk that overly strict rules kill an emerging industry.

The decision the commission makes could set a pattern for how other prediction markets operate beyond sports, such as markets tied to elections, business earnings, or entertainment. So this choice affects more than just football and basketball.