Riot Games has discussed potential esports sponsorship agreements with prediction market operators Kalshi and Polymarket ahead of the League of Legends World Championship, which begins in October. No deal has been announced, and Riot said it is evaluating the sector based on competitive integrity, value for teams, fan impact and alignment with its broader ecosystem goals. Any approved sponsor would be required to use official betting data supplied through Riot partner GRID Esports. Riot said betting tied to League of Legends and Valorant reached $10.7 billion in 2024, with most activity occurring through unregulated markets and unlicensed bookmakers. The discussions come as Kalshi and Polymarket expand across sports, while their event contracts face legal challenges from U.S. regulators and officials who argue that sports-related contracts constitute gambling.