MLB Polymarket Partnership Adds CFTC Oversight

The MLB Polymarket partnership announced on March 19, 2026, named Polymarket the league's official prediction-market exchange and included a Commodity Futures Trading Commission (CFTC) memorandum of understanding to share integrity information and bar high-risk contracts, tying product access to federal oversight.

Partnership Rights and Integrity Controls

MLB designated Polymarket as its official prediction-market exchange, granting exclusive rights to team logos and marks. Polymarket will receive official league data from Sportradar, MLB’s exclusive global data distributor, and gain brand exposure across the league’s digital platforms and events. The partnership requires Polymarket to embed integrity controls into its U.S. rulebook and bar markets the league considers integrity risks, such as individual pitches, manager decisions, and umpire performance. MLB said it will seek similar integrity agreements with other prediction-market platforms that adopt these protections.

Regulatory Framework and Market Context

The CFTC memorandum of understanding, signed by MLB Commissioner Robert D. Manfred Jr. and CFTC Chair Michael S. Selig, commits both parties to confidential information sharing on professional baseball integrity and the prediction-market landscape. It designates representatives to meet regularly and calls for coordinated, swift responses to incidents and emerging trends. The CFTC has stated that prediction markets fall under its federal jurisdiction and is in contact with other U.S. sports leagues.

The partnership includes a clause that would void the agreement if courts rule prediction markets violate state law. This provision comes amid legal challenges, including criminal charges filed on March 17, 2026, by the Arizona attorney general against rival Kalshi for operating an unlawful gambling business, and ongoing disputes over CFTC jurisdiction in several states.

Financial terms remain undisclosed. Reports have cited figures ranging from $150 million with an extension option to $300 million over three years, but the league’s announcement did not specify a dollar amount, and no SEC filing has been found. Polymarket’s capital profile has drawn attention: Intercontinental Exchange agreed in October 2025 to invest up to $2 billion, and both Polymarket and competitor Kalshi have reportedly sought funding at valuations near $20 billion.

Polymarket has established partnerships with other sports leagues, including multiyear deals with the NHL and a January 26, 2026, agreement with Major League Soccer, as well as a tie-up with the UFC. As of March 19, 2026, the NFL, NBA, PGA Tour, and NCAA had not announced prediction-market partners. High-profile athletes have invested in the space, with Giannis Antetokounmpo holding a stake in Kalshi and Saquon Barkley reportedly investing in Polymarket. Polymarket is operating in the U.S. by invitation only and is moving closer to a full launch that would allow trading on baseball this season.

The deal arrives amid heightened integrity concerns. Cleveland Guardians players Emmanuel Clase and Luis Ortiz have been charged in an alleged scheme to fix pitches, with investigations ongoing. In June 2024, MLB issued a lifetime ban to Tucupita Marcano after finding he placed nearly 400 bets during the 2022–23 seasons.

"Protecting the integrity of the game on the field is our top priority," Manfred said in the league’s press release.