NBA star LeBron James teased a partnership with prediction-market platform Polymarket in a video posted September 5. Polymarket released the full ad on September 8, showing James touring a fictional "Polymarket HQ" alongside fellow athletes Eli Manning, Derek Jeter and Sue Bird, plus celebrities Spike Lee, Emily Ratajkowski and John Leguizamo. James is the first NBA athlete to sign an individual deal with Polymarket. A spokesperson for James says his role will focus on football. The financial terms are undisclosed. Backlash started within minutes of the teaser, and it hasn't stopped.

1. It's Not Gambling, Polymarket Says (Polymarket, Kalshi)

Polymarket and Kalshi say these are financial contracts, not sports bets.

Polymarket calls this trading, not betting. Polymarket and Kalshi say their sports contracts are federally regulated derivatives, like a futures contract on corn or oil. That puts them under the Commodity Futures Trading Commission, not state gaming law.

That's the industry's defense in over 20 lawsuits right now. Polymarket and Kalshi are both fighting the same federal-versus-state line in every one of them.

LeBron James's camp calls it ordinary sports marketing. A spokesperson for James said Polymarket timed the deal to football season, not as a betting pitch. The spokesperson also said a follow-up campaign was already planned before the backlash hit.

2. But Regulators and Players' Unions Call It Unlicensed Gambling (Attorney General Letitia James, Player Associations for the NFL, MLB, NBA, NHL and MLS)

State officials and the athletes' own unions say the contracts are gambling in practice, whatever they're called on paper.

Attorney General Letitia James sued Kalshi in July. She calls its sports contracts an illegal gambling operation. Her office says Kalshi is dodging the licensing, taxes and consumer protections regulated sportsbooks have to follow.

Kentucky and Rhode Island filed similar suits. Both states' attorneys general sued Kalshi and Polymarket. Those suits are part of more than 20 now pending against the two platforms, filed by regulators, tribes and individual bettors.

Five players' unions petitioned the CFTC in April. The NFL, MLB, NBA, NHL and MLS players' unions want the CFTC to ban contracts that hinge on an individual athlete's actions, like getting injured or penalized. They argue these contracts invite manipulation and harassment. In a November 2025 survey, 78% of professional baseball players said legal betting had already changed how fans treat them.

3. And Even His Own Fans Aren't Buying It (NBA Fans, Addiction-Treatment Expert Jody Bechtold)

Fans are quoting James's own words back at him. One addiction expert says the "not gambling" framing is exactly the problem.

The most-liked comment on his own post attacked him. It got about 4,500 likes on his Instagram post and accused him of "promoting evil sports gambling." The top reply on X, with over 3,000 likes, read simply: "Don't do this Bron."

Fans are quoting his own 2023 comments back at him. He said then that "some of our regular fans that love the game kind of only care about a parlay now" and that it had "taken some of the integrity out of the game." LeBron James hasn't addressed the criticism publicly.

One addiction expert says it's the same behavior. Jody Bechtold, CEO of the addiction-treatment group The Better Institute, says her clients show the same chasing-losses, secretive behavior on prediction markets as on sportsbooks. She says calling it "investing" instead of betting makes the problem harder to spot.

Where This Lands

Polymarket and Kalshi are relying on one legal argument: that federal commodities law, not state gambling law, covers what they sell. Regulators in New York, Kentucky and Rhode Island say that's a technicality covering up gambling. The athletes' own unions say the same thing. LeBron James's fans aren't waiting for a court to decide. They're holding up his own 2023 comments as the rebuttal. He hasn't responded.

Sources