Major League Soccer (MLS) announced a multi-year partnership with Polymarket today, designating the decentralized platform as its official prediction market partner. The agreement grants Polymarket exclusive rights to offer prediction markets for the MLS Cup, All-Star Game, and Leagues Cup, integrating blockchain-based odds directly into broadcasts.
The Terms
The deal, executed through MLS’s commercial arm Soccer United Marketing, focuses on two vectors: fan engagement and betting integrity. Polymarket will provide "real-time collective sentiment" data, effectively live odds derived from order book depth, to be displayed during matches. In exchange, the league gains access to third-party monitoring of trading activity to flag potential match-fixing, a standard requirement for licensed sportsbooks.
“Through our partnership… we can surface real-time collective sentiment around key moments, giving fans a more interactive, data-driven way to experience the game.”, Shayne Coplan, Polymarket CEO
Institutional Context
This partnership would have been legally impossible twelve months ago. Polymarket operated under a CFTC ban until September 2025, when it acquired the licensed derivatives exchange QCX to facilitate a compliant return to the U.S. market. MLS is now the second major league to formalize ties with the platform, following the NHL’s similar move in October 2025.
The deal signals a rapid normalization of crypto-native derivatives in regulated sports. Polymarket, built on the Polygon network, saw trading volumes explode to nearly $40 billion combined with rival Kalshi in 2025, driven by election speculation and the platform’s U.S. reentry.
