Jaylen Brown has reportedly agreed to a record-setting five-year, $304 million new supermax contract extension with the Boston Celtics, sources with knowledge of the situation confirmed to the Athletic's Shams Charania.
"BREAKING: Boston Celtics star Jaylen Brown has agreed to a five-year, $304 million supermax contract extension with the franchise, per sources. This is the richest deal in NBA history, negotiated by agent Jason Glushon. Fully guaranteed, with a trade kicker. No player option," Charania tweeted on Tuesday (July 25).
The new deal will keep Brown, a two-time All-Star, under contract with the Celtics through the 2028-29 NBA season and exceeds the $276 million extension Denver Nuggets center Nikola Jokic signed last offseason.
Brown reportedly took a physical on Monday (July 24) as part of the agreement, according to ESPN's Marc J. Spears. The former University of California standout was eligible for a five-year supermax extension this offseason after being selected to the All-NBA second-team in 2022-23.
Celtics forward Jayson Tatum will be eligible for a supermax extension during the next offseason. Brown is coming off a season in which he averaged career-bests 26.6 points and a 49% shooting percentage in 2022-23. Tatum and Brown combined to average 56.7 points per game, the fourth-most by a duo since the league's merger with the ABA in 1976, according to research conducted by ESPN Stats & Information.