Kalshi Announces Multi-Year Sponsorships With Five Major League Baseball Teams

Kalshi, the New York-based prediction market, has secured multi-year commercial partnerships with five high-profile Major League Baseball (MLB) teams. The Atlanta Braves, Boston Red Sox, Los Angeles Dodgers, San Diego Padres, and San Francisco Giants are all participating in this sponsorship initiative. This move marks the latest phase in Kalshi's sports-focused expansion, even as the company faces regulatory scrutiny over its event contracts in certain US states.

Kalshi's Expansion Through MLB Sponsorships

Kalshi revealed the new deals on Tuesday, 25 August, positioning the partnerships as a natural fit given the growing presence of baseball markets on its platform. These agreements provide Kalshi with increased brand exposure at the stadiums and in team communications. According to Adam Barrick, head of sports partnerships at Kalshi, "The idea is that fans are already engaging with their favourite teams on Kalshi, so it only makes sense to extend that fandom to some of the most beloved baseball teams in America."

Trading activity on Kalshi has shown notable growth: the company reports a 36-fold increase in baseball trading volume compared to a year ago. At publication time, over 500 live baseball markets are available on Kalshi, spanning prop-style outcomes such as home runs, strikeouts, and stolen bases. Nearly $60 million has reportedly been traded on the outcome of the World Series alone.

Sports Prediction Market Competition: Kalshi vs. Polymarket

The MLB deals place Kalshi in direct competition with Polymarket, another operator licensed for US prediction markets. Major League Baseball itself has designated Polymarket as an official sponsor since March, in conjunction with a data-sharing agreement between MLB and the Commodity Futures Trading Commission. Polymarket's reach has expanded further in the past year with similar sponsorships involving Major League Soccer (MLS) and the Ultimate Fighting Championship (UFC).

Kalshi’s own sports portfolio extends beyond baseball. The firm recently signed marketing partnerships with the National Hockey League (NHL), the Chicago Blackhawks, and Madison Square Garden Entertainment Corp, reflecting its strategy to increase engagement through prominent sports entities. The two platforms are now both actively pursuing media partnerships and content integrations to grow their market share within regulated US markets.

Content Sponsorships and Media Partnerships

Kalshi is reportedly negotiating to sponsor sports journalism content published by The Athletic, as reported by Front Office Sports. The Athletic's coverage of the World Cup already included Kalshi branding. The sports portal, owned by The New York Times, previously had a sponsorship deal with BetMGM. Kalshi’s actions in this space reflect a broader effort by prediction platforms to align themselves with trusted sports news providers.

Regulatory and Legal Challenges Facing Kalshi

Kalshi’s expansion takes place amid complicated legal circumstances. In early August, a Connecticut judge denied Kalshi a preliminary injunction that would have permitted the platform to operate while challenging state interpretations of its product as gambling. In parallel, the New York attorney general has filed a $36 billion lawsuit against the company, arguing that sports event contracts constitute gambling under state law.

Kalshi contests this view, positioning itself as a trading platform distinct from gambling operators. The legal debate over whether event contracts on sports outcomes are financial instruments or wagering remains unresolved in several US jurisdictions. Both the Connecticut and New York cases highlight regulatory uncertainty as the main obstacle to broad US market access for prediction markets operators.

Outlook for Sports Prediction and Partnerships

Kalshi’s sponsorship push comes as the volume and diversity of tradable sports markets surge. The platform’s expansion strategy mirrors the playbook of established sportsbooks—leveraging team and league affiliations to drive customer engagement and legitimacy. Yet the ongoing legal pushback in some states could constrain further market growth in the immediate term. Platform vendors and market participants will be monitoring developments closely as courts and regulatory agencies clarify the permitted scope of event-based trading.

For those tracking ongoing deals and compliance issues across North American markets, the latest sponsorships situate Kalshi in the heart of the increasingly competitive prediction platform sector. The interplay between regulatory permissions, league partnerships, and market liquidity will determine which firms are best positioned as this b2b segment matures.