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(AsiaGameHub) – Senator Richard Blumenthal has set a May 1 deadline for every major U.S. sports league to provide details about their gambling partnerships. As Washington examines betting connections across sports more closely, the pressure now extends beyond sportsbooks to include prediction markets.
Good to Know
- Blumenthal dispatched letters to the NFL, NBA, MLB, NHL, MLS, and NCAA.
- He is seeking specifics on sportsbook agreements, data contracts, advertising deals, and prediction market partnerships.
- The MLB, NHL, and MLS already have publicly known connections to prediction market operators.
Senate Pressure Reaches Every Major League
Blumenthal sent letters to the commissioners of the NFL, NBA, MLB, NHL, MLS, and NCAA, requiring a complete report of each organization’s relationship with the gambling industry by May 1, 2026. The scope extends far beyond sportsbook sponsorships; he also wants information on data agreements, advertising deals, prediction market partnerships, and any other commercial arrangements linked to wagering platforms.
“Eight years ago, when the federal sports gambling ban—one that the leagues backed—was overturned, gambling began to seep into every part of sports,” he stated in relation to the letters. “This unchecked growth of sports gambling has led to increased addiction, risks to players, and even the potential corruption of the games themselves.”
Since the Supreme Court lifted the federal sports betting ban in 2018, leagues have developed stronger business connections in areas like betting, media, data, and fan interaction. Now Congress is requesting documentation of these ties.
Blumenthal has frequently targeted platforms like Kalshi and Polymarket, claiming they attempt to offer sports betting products while evading the state regulations that licensed sportsbooks must follow. His recent letters indicate he wants to understand the extent of sports leagues’ current partnerships with these companies.
Several of these connections are already public knowledge. The MLB named Polymarket its Official Prediction Market in a three-year deal valued at up to $300 million. The NHL holds licensing agreements with both Polymarket and Kalshi. The MLS also has a marketing pact with Polymarket. The NBA hasn’t revealed any prediction market deals yet, though Commissioner Adam Silver has noted the league is exploring the sector.
The NCAA differs from professional leagues. It has opposed gambling partnerships and strongly resisted prop bets related to college sports. NCAA leaders have also cautioned that sports event contracts on prediction platforms could compromise game integrity in college sports. Despite this, Kalshi has listed college sports markets, including tournament games.
Blumenthal is positioning the disclosure as a foundation for more comprehensive federal action on gambling. Thus, the leagues’ responses might do more than just address a Senate letter—they could influence the upcoming debates over sports betting regulations, prediction markets, and the very definition of gambling.
FAQ
Which leagues received letters from Blumenthal?
The NFL, NBA, MLB, NHL, MLS, and NCAA each received a letter from Blumenthal.
What is Blumenthal requesting from these leagues?
He is asking for a detailed breakdown of their relationships with the gambling industry, including sportsbook agreements, advertising partnerships, data contracts, and prediction market connections.
What is the deadline for responses?
Leagues are required to submit their responses by May 1, 2026.
Why are prediction markets included in this inquiry?
Blumenthal claims that platforms like Kalshi and Polymarket attempt to offer sports betting products while bypassing the regulations that licensed sportsbooks are subject to.
How does the NCAA differ from the other leagues?
The NCAA has taken a stance against gambling partnerships and has warned about betting products linked to college sports—particularly prop bets and sports event contracts.
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