See what Jalen Williams is worth in 2026, how much he earns on his $239 million Thunder extension, which brands he works with. Oklahoma City Thunder forward Jalen Williams (8) reacts after a play against the Indiana Pacers during the second half of game seven of the 2025 NBA Finals at Paycom Center. Oklahoma City Thunder secures Jalen Williams with a five-year, potentially $287 million rookie max extension.