Williams has agreed to a five-year maximum rookie extension that could reach $287 million, according to ESPN. This OKC "big three" is now locked in with the Thunder for multiple years and could account for as much as $822 million on the payroll.

Oklahoma City Thunder guard Jalen Williams agrees to rookie max 5-year contract extension that could be worth $287 million.

Oklahoma City ensures its young All-Star forward will stay put with a deal reportedly worth up to $287 million.