Photo: Instagram/Jaylen Brown The Boston Celtics have now firmly entered a win-now phase after agreeing to a monumental 5-year, $304 million supermax extension with Jaylen Brown , making it the largest contract in NBA history. When combined with his 2023-24 salary of $28.5 million, Brown's total earnings amount to an astonishing $332.5 million. Although such astronomical figures are becoming more commonplace in the sports world, it remains an unfathomable sum for all but a select few. The fully guaranteed contract puts immense pressure on the Celtics to succeed immediately. With their current roster commitments, they are already looking at a luxury tax bill of $21.7 million and will likely remain a repeater-tax team in the future, which could lead to further financial restrictions. Photo: Instagram/Jaylen Brown This extension also has implications for other players on the team. With Kristaps Porziņģis ' contract extended by two years and $60 million, and Jayson Tatum likely to...