Polymarket Sports Deals Face US Regulatory Scrutiny
Polymarket is expanding rapidly through major sports partnerships, but its growth faces mounting US regulatory scrutiny. In March 2026, Polymarket signed a reported $300 million, four-year deal to become Major League Baseball’s exclusive prediction-market partner in the US and Canada. It also holds an exclusive agreement with MLS, while the NHL works with both Polymarket and Kalshi.
Kalshi has pursued team-level branding deals with five MLB clubs. Including Polymarket’s league partnership, seven MLB teams now have prediction-market affiliations. On 27 August, Sportradar expanded its partnership with Polymarket to cover more than 20 leagues and about 300,000 matches annually.
However, roughly 20 US states have filed or joined lawsuits arguing that sports prediction contracts are illegal gambling rather than federally regulated event contracts. Polymarket and its partners say the products fall under the CFTC’s jurisdiction. A memorandum of understanding between Polymarket, MLB and the CFTC focuses on information sharing and market integrity.
For traders, Polymarket’s partnerships could increase adoption, liquidity and sports-data integration. The main risk is regulatory uncertainty. State court decisions, CFTC policy and possible restrictions on sports contracts could affect platform access, volumes and valuations. The news is more relevant to prediction-market and crypto-sector sentiment than to immediate prices of major cryptoassets.
Neutral
The expected market impact is neutral because the developments create both adoption benefits and regulatory risks, without a direct change to the supply, demand or network fundamentals of major cryptoassets. Polymarket’s MLB, MLS and Sportradar agreements could increase prediction-market visibility, trading activity and data integration. That may support broader crypto-sector engagement, particularly if event contracts are increasingly accessed through digital-asset infrastructure.
At the same time, lawsuits from roughly 20 states introduce a significant policy overhang. A restrictive ruling could reduce US access, liquidity and transaction volumes on Polymarket and Kalshi. It could also weaken the commercial value of sports partnerships. Conversely, clearer CFTC oversight or favourable court decisions could remove uncertainty and encourage institutional participation.
In the short term, traders are more likely to react to court filings, injunctions, CFTC statements and platform-access changes than to the partnership announcements themselves. The effect on BTC and ETH should remain limited unless the dispute expands into a broader conflict over crypto-based financial products. In the longer term, regulated prediction markets could become a meaningful fintech and crypto-adjacent sector, but fragmented state rules may keep valuations volatile. Similar regulatory disputes involving crypto exchanges and derivatives platforms have typically produced sharp, event-driven moves in affected assets while having limited sustained impact on the wider market. Therefore, the current balance of commercial expansion and legal uncertainty supports a neutral classification.