data-mm-id=”_lmvbttloi”>On Tuesday, the Boston Celtics inked Jaylen Brown to a supermax extension and the numbers are nothing short of obscene. The new deal is worth a whopping $304 million over five years, meaning Brown will make $60 million per season over the life of the contract. An absolutely massive haul — and one that many are calling an overpay from the outset. 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. pic.twitter.com/MQ6NKILY8Q— Shams Charania (@ShamsCharania) July 25, 2023The argument for why it's an overpay isn't complicated. Brown…