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NBA icon LeBron James is adding another high-profile venture to his off-court portfolio. The four-time champion has linked up with Polymarket as athlete involvement in prediction markets continues to grow.

The full scope of their partnership is still unknown, though more details are reportedly set to be revealed Tuesday.

LeBron James Teases ‘Exclusive’ Polymarket Deal

LeBron James is expanding his business portfolio with a new partnership in the booming prediction market industry.

The Philadelphia 76ers star announced an upcoming collaboration with Polymarket on Saturday, teasing the deal in a 14-second video posted to X. The clip showed James stepping out of an elevator after selecting a floor labeled “sports,” while other options included politics, crypto, culture, and technology.

“Welcome to Polymarket HQ. Coming soon,” James captioned the post.

The exact nature of the four-time NBA champion’s role has yet to be revealed. However, a Polymarket spokesperson described the deal to The Athletic as an “exclusive partnership” and said it would announce additional details Tuesday.

The company also signaled that James’ interest in football could play a role in the collaboration as it looks to introduce Polymarket to a wider audience.

Rumors Shed More Light On The Partnership

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As fans await details of James’ mysterious Polymarket deal, new reporting may already offer the clearest indication yet of what the partnership will involve.

According to Front Office Sports, the agreement is expected to focus heavily on football, with a larger campaign reportedly in the works. That would continue a familiar endorsement strategy for the NBA superstar.

James previously had a deal with DraftKings that began in 2024 and also centered largely on football. That arrangement reportedly expired earlier this summer, clearing the way for his move to Polymarket.

The reported switch is notable because prediction markets occupy a somewhat different lane from traditional sportsbooks. However, the NBA has not specifically prohibited players from endorsing companies such as Polymarket, a source familiar with the matter told the outlet.

• LeBron James’ first game as a 76er revealed.
• Kevin Durant hit out at critics of James’ decision to play for the 76ers.
• The decorated forward said the move was his “last decision.“
• Shaq had previously hinted at the kind of team LeBron would join.
• An old LeBron joke by Trump resurfaced amid debate on trans athletes.
• Trump later suggested the basketball star is “racist.”

LeBron James Follows Messi And Giannis Into Prediction Markets

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James isn’t alone in lending his star power to the fast-growing prediction market industry. In February, Giannis Antetokounmpo announced that he had become a shareholder in Kalshi. The company said the two-time MVP was its first basketball star to join as an investor, and his involvement also extends to marketing and live events.

Lionel Messi later became another prominent face in Kalshi’s sports push. The company struck a marketing agreement with Argentina’s national team in June, with the soccer legend promoting a related giveaway on Instagram.

Kalshi’s athlete roster extends beyond the pair. Golfer Bryson DeChambeau, NHL star Connor McDavid and WNBA standout Breanna Stewart have also been identified as investors or partners.

Polymarket, meanwhile, recently recruited Maria Sharapova. The retired tennis champion appeared in an ad for the platform during the US Open, becoming its first celebrity partner.

James Recently Turned His Golf Passion Into A New Venture

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Polymarket isn’t the only new project keeping James busy away from the basketball court.

In August, the 41-year-old launched a YouTube channel centered on his growing passion for golf. Its debut featured a 90-minute video documenting a trip to Scotland with members of the 2016 Cleveland Cavaliers championship team. The reunion marked ten years since the Cavs captured the NBA title.

As reported by The Blast, fans quickly followed James to his new platform, and the channel attracted more than 370,000 subscribers on its first day. The debut video also racked up nearly one million views over the same period.

How LeBron James’ Move Could Push Prediction Markets Further Into The Mainstream

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Prediction markets were already making major inroads into sports before James entered the picture.

During the 2026 World Cup, Kalshi attracted roughly 3 million users and generated $27 billion in trading volume, according to Reuters. The NBA has also reportedly explored partnerships with prediction-market platforms, signaling growing interest at the league level.

James could accelerate that momentum. His Polymarket teaser alone reportedly approached 10 million views within seven hours. Between that and the impressive numbers on his new golf channel, the basketballer has been offering a glimpse of the audience he can bring to the industry.

The LeBron James Expands Business Empire With Move Into Prediction Markets first appeared on The Blast