Key Highlights
- Polymarket has been designated as Major League Baseball’s exclusive official partner for prediction markets
- The platform gains exclusive rights to utilize MLB branding, official statistics, and promotional opportunities at baseball events
- A memorandum of understanding between MLB and the CFTC establishes protocols for information sharing on market integrity
- The announcement comes after federal indictments against Cleveland Guardians pitchers in a pitch-fixing scandal
- Baseball becomes the fourth major sports organization to align with prediction market operators, following MLS, NHL, and UFC
Major League Baseball revealed on Thursday that Polymarket has been selected as its official prediction market platform partner, granting the company exclusive access to league trademarks, verified data streams, and visibility at official MLB gatherings.
According to initial reporting by Front Office Sports, the partnership spans multiple years. This arrangement represents the newest collaboration between a premier sports organization and the emerging prediction market sector.
In conjunction with the Polymarket announcement, MLB finalized a memorandum of understanding with Commodity Futures Trading Commission Chair Michael Selig. This MOU creates a framework for sharing intelligence regarding market integrity issues and professional baseball operations.
While not legally enforceable, this represents an unprecedented cooperation agreement between a federal regulatory body and a major professional sports league.
CFTC Chair Selig shared on X: “We’ve committed to work together to protect the integrity and resilience of prediction markets relating to professional baseball.”
The Integrity Component Behind the Partnership
The unveiling of this partnership is intrinsically connected to controversies that emerged in recent months. Last November, federal prosecutors filed criminal charges against two pitchers from the Cleveland Guardians, alleging they accepted payments from gamblers to manipulate specific pitches during official games.
These allegations intensified scrutiny on baseball’s evolving relationship with wagering activities. MLB Commissioner Robert Manfred confronted the issue head-on in his official remarks.
“Protecting the integrity of the game on the field is our top priority,” Manfred said. “By engaging in this community, we are able to work together to create clear boundaries with the goal of mitigating risk while providing fan engagement opportunities.”
Under the terms of the agreement, Polymarket and MLB have committed to prohibiting markets that could compromise competitive integrity. This encompasses betting opportunities on individual pitch outcomes, managerial tactical decisions, and officiating crew performance.
Despite Polymarket’s exclusive designation, MLB confirmed it will maintain existing relationships with alternative prediction market platforms offering baseball-related contracts.
Regulatory Challenges Facing Prediction Market Platforms
Polymarket CEO Shayne Coplan characterized the partnership as an initiative to enhance fan connection to the sport while collaborating with oversight authorities to ensure competitive integrity.
The announcement arrives during a period of increased regulatory scrutiny for prediction market operators. Earlier this week, Arizona’s attorney general announced criminal proceedings against Kalshi, a competing prediction market service, claiming the platform was conducting unlawful gambling operations within state boundaries.
Kalshi responded by dismissing the allegations as “meritless.” CFTC Chair Selig characterized Arizona’s legal action as “entirely inappropriate.”
The CFTC’s collaborative approach with MLB is interpreted as federal endorsement of sports-related prediction markets, even as state gaming authorities maintain these platforms should be regulated as sports betting operations.
MLB’s arrangement with Polymarket mirrors comparable agreements established by the National Hockey League, Major League Soccer, and the Ultimate Fighting Championship.
Polymarket has additionally formed a data exchange relationship with Dow Jones, which publishes Barron’s.



