LeBron James Announces Partnership with Polymarket

ChainCatcher reports that this set of posts appears to be the first public exposure of James’s formal relationship with Polymarket. Neither Polymarket nor representatives from the 76ers have immediately responded to The Block’s request for comment. Prior to this, James’s free agency decision generated approximately $273 million in related contract trading volume across major prediction platforms, according to Legal Sports Report—a figure surpassing any single basketball game; data from Front Office Sports shows about $226 million in trading volume on Kalshi and over $43 million on Polymarket’s international platform. Most traders bet incorrectly: before the official announcement, the 76ers’ odds of winning were only around 9%, while the Heat’s were approximately 45%. James subsequently signed a two-year, $8 million contract with the 76ers, including a player option. Additionally, James previously entered into a multi-year ambassador agreement with DraftKings in 2024. Some fans have expressed criticism on social media regarding James’s collaboration with prediction platforms.