Major League Baseball (MLB) has taken another step into prediction markets with two new agreements announced on 19 March 2026. The MLB Polymarket partnership names Polymarket as the league’s official prediction market exchange partner. At the same time, MLB has agreed an integrity-focused memorandum with the Commodity Futures Trading Commission.

• MLB confirmed Polymarket as its Official Prediction Market Exchange partner, giving the operator access to league marks, logos and official data via Sportradar. The agreement also includes visibility across MLB’s digital channels and events. As part of the MLB Polymarket partnership, both sides will work on limiting certain market types seen as higher risk.
• The integrity framework will restrict markets tied to specific in-game actions such as individual pitches, umpire calls and manager decisions. MLB said these areas could create integrity concerns if offered widely. Polymarket will also apply consistent integrity controls across its US Rulebook for all brokers.
• Alongside the commercial deal, MLB signed an MOU with the CFTC to support information sharing around prediction markets. The two parties will exchange data confidentially and hold regular meetings to monitor risks. MLB said the agreement should help improve oversight and response times as the prediction market space develops.

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