LeBron James Joins Polymarket as Lawsuits Pile Up
James is tying his name to Polymarket as the U.S. regulator CFTC and states keep fighting over the legal status of prediction markets.
Key Takeaways
- LeBron James made his partnership with Polymarket public in a video on X; Polymarket says a full reveal is coming Tuesday.
- The move follows the end of his deal with DraftKings, while prediction markets are growing fast and facing more legal scrutiny in the U.S.
- Polymarket is expanding with sports deals and looking for capital, while regulators and sports leagues are taking different approaches to prediction markets.
LeBron James has made his partnership with Polymarket public in a video he posted on X. The prediction market says it will unveil the full reveal on Tuesday. The move puts one of the biggest sports names in the world behind a sector that is growing quickly, but is also running into regulators and gambling rules in the U.S. more and more often.
From DraftKings to Polymarket
In the video, James walks through an elevator in what he calls Polymarket HQ. He passes buttons for politics, crypto, economics, culture, weather, esports, and technology, then steps out on the sports floor. That puts him behind a platform that is not just about sports, but also about broader topics users can trade on.
The switch follows his earlier deal with sportsbook DraftKings, which ended this summer. That makes the timing notable, because James is now showing up with a company that is trying to take market share from traditional sportsbooks. The sector was still processing about $1.2 billion (€1 billion) per month in early 2025, but by January that had climbed to more than $20 billion (€17.2 billion).
Legal Pressure in the U.S.
The growth of prediction markets is going hand in hand with more legal pressure. Baltimore sued both major players in August and called them unlicensed sportsbooks. New York filed a case against Kalshi in July for more than $36 billion (€31 billion). Cases like these fit into a broader fight over how these contracts should be classified legally.
On top of that, the rules differ from one sports league to another. The NBA allows players to promote prediction markets, but bans contracts directly tied to NBA games. The NFL and the PGA Tour would reportedly ban those deals outright. Other sports names have already jumped in too: Giannis Antetokounmpo became an investor in Kalshi earlier this year.
Why This Matters Here Too
For European crypto followers, this is especially relevant because prediction markets are starting to look like a mix of crypto, sports, and regulated investment products. In the U.S., the CFTC oversees these markets and they are treated as swaps at the federal level, while states regularly push back. A federal court also ruled in April that sports contracts on prediction markets fall under that federal interpretation and not under state gambling rules.
Polymarket is still expanding. The platform became the official prediction market partner of Major League Baseball and also signed deals with the NHL in October 2025. According to earlier reports, the company is also raising a large amount of capital at a much higher valuation than last year, while Intercontinental Exchange has already committed $2 billion (€1.7 billion). The coming weeks should show whether LeBron James' name brings mostly extra attention, or also actually attracts new traders.
