LeBron James is joining the Philadelphia 76ers for the 2026-27 season, making them the fourth NBA team of his career, while signing a reported $15 million endorsement agreement with prediction-market company Polymarket. Front Office Sports reported that James is an endorser rather than an investor and that the deal’s duration remains undetermined. His content will focus on football and non-basketball topics to comply with NBA rules restricting players from promoting prediction-market contracts tied to NBA games. James signed a two-year, $8 million deal with Philadelphia and is due $3,876,529 this season, roughly 3.87 times less than the reported Polymarket payment and 92.6% below his $52,627,153 Lakers salary last season. The partnership comes as Polymarket and Kalshi compete for athlete and league agreements, while the legal status of sports event contracts remains contested in the United States.