Shai Gilgeous-Alexander's offseason just got $285 million sweeter ... the NBA champion just locked in a super max contract with the Thunder -- making him the highest-paid NBA player ever!!
The blockbuster four-year deal was announced on Tuesday, keeping the NBA MVP with the champion Thunder through the 2030-31 season.

Doing the math ... it means SGA will earn $71.25 million per year, making it the NBA's highest annual salary in league history.