Boston Celtics star Jaylen Brown has agreed to sign the richest deal in NBA history — a five-year supermax extension worth up to $303.7 million.

Brown and  his  agent  Jason Glushon met with Celtics management and ownership on  Sunday  in Boston, to finalize   the remaining elements of the historic deal that keeps the two-time all-star under contract through the 2028-29 season.

Brown’s deal exceeds two-time MVP Nikola Jokic’s $276 million extension with the Denver Nuggets, an increase based on the rise in the salary cap and league revenue. 

The  26  year old Brown  took a physical on Monday in Boston to solidify the deal.

Brown became eligible for the five-year supermax extension with the Celtics upon earning second-team All-NBA honors i2022-23. 

Brown and teammate Jayson Tatum, who is eligible for a supermax extension next summer, constitute one of the NBA’s most productive duos and are cornerstones of the Celtics’ championship contender.

Brown averaged career bests of 26.6 points and 49% shooting last season…….he will make $31.8 million next season in the final year of his previous deal.

Brown is slated to make $52.3 million when the contract kicks in during the 2024-25 season and $69.1 million in 2028-29, the final year of the deal.