Why Are Sports Leagues Partnering With Prediction Markets?

Sports leagues are partnering with prediction markets to gain revenue, control, and integrity oversight over a rapidly growing industry that is already attracting billions in sports-related trading volume. In early 2026, a wave of major league partnerships signaled that professional sports organizations have moved from skepticism to strategic engagement with prediction markets.

The Partnership Wave

In just the first quarter of 2026, several major deals were announced:

• MLB + Polymarket (March 2026): Major League Baseball named Polymarket its exclusive prediction market partner, granting access to official league data via Sportradar and the right to use MLB logos. Simultaneously, MLB signed a memorandum of understanding with the CFTC to establish a sports integrity framework.
• NHL + Kalshi + Polymarket (early 2026): The National Hockey League announced multi-year partnerships with both leading prediction market companies.
• MLS + Polymarket (early 2026): Major League Soccer entered a multi-year partnership granting similar data and branding rights.

These deals followed Polymarket's data partnerships with technology companies including Google and Palantir, the latter specifically to build a "next-generation sports integrity platform."

Why Leagues Are Getting Involved

1. If You Can't Beat Them, Partner With Them

Prediction markets are trading billions of dollars weekly on sports outcomes — with or without league involvement. By partnering, leagues gain a seat at the table rather than watching from the sidelines as a parallel betting ecosystem grows around their product.

2. Revenue and Brand Exposure

Partnership deals include brand exposure at games, through digital channels, and on prediction market platforms. As prediction market user bases grow into the millions, leagues see meaningful marketing and revenue value.

3. Integrity Control

Perhaps the most important driver: partnerships give leagues direct input into the rules governing sports-related prediction contracts. The MLB-CFTC memorandum of understanding creates formal information-sharing between the league and the federal regulator, allowing both sides to monitor for market manipulation, match-fixing risks, and suspicious trading patterns.

This mirrors the playbook that sports leagues developed with traditional sportsbooks after the U.S. Supreme Court struck down the federal sports betting ban (PASPA) in 2018.

4. Data Monetization

Official league data partnerships (like MLB's deal routing through Sportradar) create new revenue streams. Prediction market operators need reliable data for contract resolution, and leagues can monetize their first-party data for this purpose.

5. Regulatory Positioning

By actively engaging with prediction markets and regulators, leagues position themselves as responsible stakeholders rather than passive observers. This gives them leverage in ongoing regulatory battles between federal and state authorities.

The Integrity Question

League involvement in prediction markets is not without controversy. Prior to these partnerships, MLB and other leagues had publicly expressed concern about how prediction markets might:

• Create incentive structures that could compromise game integrity
• Allow retail traders to bet on outcomes that could be influenced by individuals with inside access
• Blur the line between following sports and gambling on them

The partnership model attempts to address these concerns through:

• Integrity monitoring agreements with regulators
• Data control — ensuring market resolution uses official, verified league data
• Input on contract types — leagues can influence what prediction market questions are offered about their sport
• Technology partnerships — Polymarket's deal with Palantir explicitly targets integrity analytics

What This Means for iGaming Operators

Prediction Markets Are Going Mainstream

When MLB, NHL, and MLS sign partnership deals with prediction market companies, the product category has crossed from experimental to mainstream. Operators considering prediction market integration should take note of the legitimacy signal.

Data Partnerships Are the Model

The structure of these deals — official data feeds, integrity frameworks, brand licensing — mirrors established sports betting partnerships. Operators building prediction market products should expect similar data licensing requirements.

Integrity Infrastructure Is Non-Negotiable

Every major league partnership has included integrity provisions. Operators entering the prediction market space without robust integrity frameworks will be at a competitive disadvantage and may face regulatory barriers.

The Sports Vertical Is Accelerating

The convergence of traditional sports betting, prediction markets, and league partnerships creates an expanding market for operators who can offer both products. Cross-selling between sportsbook and prediction market interfaces could become a key differentiator.

Frequently Asked Questions

Which sports leagues have partnered with prediction markets?

As of March 2026, MLB, NHL, and MLS have all signed partnership deals with prediction market companies. MLB named Polymarket its exclusive prediction market partner, while the NHL partnered with both Kalshi and Polymarket.

Does MLB's Polymarket deal mean prediction market sports betting is legal?

The deal reflects MLB's acceptance of prediction markets as a regulated product category, but legality varies by state. Multiple states are challenging whether prediction market sports contracts comply with state gambling laws, regardless of CFTC approval.

What is a sports integrity framework for prediction markets?

It is a set of agreements between sports leagues, prediction market operators, and regulators that governs how sports-related event contracts are offered, monitored, and resolved — including information-sharing to detect manipulation and match-fixing.

How do prediction market sports contracts differ from traditional sports bets?

Prediction market contracts are binary (yes/no) event contracts regulated by the CFTC as commodity futures, while sports bets are regulated by state gaming commissions. In practice, the user experience can be quite similar — a key reason states have challenged prediction markets as unregulated gambling.

Can operators offer both sportsbook and prediction market products?

In principle, yes — but each product line requires different regulatory approvals. A sportsbook needs state gaming licenses, while a prediction market exchange needs CFTC designation. Some operators may choose to partner with or white-label from existing prediction market platforms rather than seeking separate federal approval.