Key Highlights
- Major League Baseball names Polymarket its official exchange with exclusive commercial rights.
- MLB signs an MOU with CFTC to coordinate oversight and share integrity-related data.
- The new framework restricts high-risk markets and sets compliance expectations for all platforms offering MLB-linked contracts.
Major League Baseball (MLB) has entered a formal partnership with Polymarket, naming it the league’s official prediction market exchange today.
According to the official announcement, the agreement gives Polymarket exclusive rights to use MLB branding across its products, along with access to official league data distributed by Sportradar. The platform is also set to be featured across MLB’s digital channels and events.
The deal places prediction markets closer to the league’s core ecosystem, a shift from earlier arms-length approaches to emerging betting-like products.
Integrity controls built into the partnership
The central feature of the arrangement is the introduction of restrictions on certain types of markets. MLB and Polymarket plan to limit contracts that could create conflicts of interest or raise integrity concerns.
This includes markets tied to granular, in-game actions such as individual pitches, umpire decisions, or managerial calls, areas where insider knowledge could influence outcomes.
Polymarket is expected to reflect these constraints in its U.S. rulebook, with requirements extending to brokers operating on the platform to maintain consistent standards.
Coordination with CFTC
The move comes as MLB Commissioner Robert D. Manfred Jr. signed a memorandum of understanding with Commodity Futures Trading Commission (CFTC) Chairman Michael Selig.
The agreement outlines a framework for information sharing between the league and the regulator. Both sides will exchange data related to betting patterns, potential risks, and integrity concerns tied to baseball-linked prediction markets.
Regular meetings between designated representatives are expected to support monitoring efforts and allow for quicker responses to unusual activity. Information shared under the arrangement will remain confidential.
Expansion amid regulatory pressure
The MLB–Polymarket partnership comes as lawmakers push for tighter controls across the sector.
A day ago, Senator Chris Murphy and Representative Greg Casar introduced the BETS OFF Act, a bill that would ban wagers on events where outcomes are controlled or known in advance, including government actions, war, and terrorism.
The proposal follows scrutiny over well-timed bets on platforms like Polymarket and Kalshi tied to geopolitical events. In some cases, large wagers were placed shortly before real-world developments, raising concerns about the use of non-public information.
Push for oversight across platforms
While Polymarket receives exclusive commercial rights, MLB indicated that integrity standards will not be limited to a single platform.
Other prediction market operators offering baseball-related contracts are expected to adopt similar safeguards within their own rulebooks. The league’s approach suggests an attempt to standardize how such markets operate, regardless of provider.
This follows earlier calls from MLB urging stronger regulatory oversight as prediction markets expanded into areas tied to real-world events.
Broader context
The agreements reflect growing attention on how prediction markets intersect with professional sports. As these platforms gain traction, leagues and regulators are increasingly focused on defining acceptable boundaries.
For MLB, the emphasis appears to be on preemptive controls: limiting high-risk market types and establishing communication channels with regulators before issues arise. The outcome of this approach may shape how other sports leagues engage with prediction market platforms in the future.
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