The NBA champion Oklahoma City Thunder have agreed a five-year contract extension worth up to $287 million with 24-year-old All-Star forward Jalen Williams, ESPN reported Thursday.ESPN cited Williams's agents in reporting the extension of Williams's rookie contract -- which makes the 24-year-old the latest key piece of Oklahoma City's title run to commit to the Thunder long-term.

Williams can receive the maximum amount of money if he reaches certain escalators, such as making another All-NBA team or winning MVP, through the Derrick Rose Rule

All-NBA forward Jalen Williams and the big-spending Oklahoma City Thunder are finalizing a five-year supermax contract extension with a value that could inflate to $287 million.