Last summer Jaylen Brown signed the richest contract in NBA history. That record would stand for a season, but this summer it's Jayson Tatum's turn as he has agreed to a super max 5 extension with the Boston Celtics for $314 million. That number now makes Tatum's contract the richest in NBA history.
Tatum will have a player option on year 5. Here is the year by year breakdown of the extension:
Earlier today the Celtics agreed to a 4 year extension with starting guard Derrick White, so the total bill for today is a whopping $440 million.