LeBron James teases Polymarket partnership with football focus

LeBron James teased an upcoming partnership with Polymarket on Saturday, posting a 14-second video on X that looked like an ad for the prediction-market company. The caption read, "Welcome to Polymarket HQ. Coming soon. In partnership with @Polymarket," and the video showed James in the elevator at Polymarket's headquarters before he headed to the company's sports floor. CNBC said a person familiar with the matter expects the campaign to focus on football.

The Block reported that the post was the first step in a larger campaign. Polymarket reposted the clip less than an hour later and replied, "thanks for swinging by our HQ."

The terms of the agreement have not been disclosed. CNBC said NBA rules restrict players' financial interests in companies that offer league-related wagering or similar products, including limits on ownership stakes. The Block reported that James's previous deal with DraftKings expired earlier this summer, and that his 2024 talent ambassador agreement with DraftKings focused on football and select tentpole events.

Polymarket already has ties with several major sports properties. Official releases show partnerships with Major League Soccer, the New York Yankees and the New York Rangers. A Congressional Research Service report says prediction markets are exchange platforms for event contracts and that sports accounted for 38% of Polymarket's $36.2 billion traded volume over the past year as of February 2026. Further details on the James campaign are expected next week.