Jaylen Brown, Celtics agree to 5-year deal worth up to $304M US, biggest in NBA history

The Boston Celtics have answered their most pressing question of the off-season. Jaylen Brown will be part of the franchise for the foreseeable future.

The Celtics' wing has agreed to terms on a five-year supermax contract extension that will pay him up to $304 million US, his agent said Tuesday.

It's the richest contract in NBA history, surpassing the $264 million deal signed by Nuggets centre Nikola Jokic last summer.

The deal was first reported by ESPN and confirmed to The Associated Press by Brown's agent, Jason Glushon.

Jaylen Brown and the Boston Celtics have agreed on a five-year supermax extension worth up to $304 million, the richest contract in NBA history, his agent Jason Glushon of <a href="https://twitter.com/GlushonSM?ref_src=twsrc%5Etfw">@GlushonSM</a> tells ESPN. <a href="https://t.co/oYmD6XDy9D">pic.twitter.com/oYmD6XDy9D</a>

It keeps Brown with the team that drafted him third overall in 2016 and watched him develop into a two-time All-Star.

He averaged career highs of 26.6 points, 6.9 rebounds and 3.5 assists last season. But those numbers went down in the playoffs, when the Celtics lost to the Miami Heat in the Eastern Conference finals. In Game 7, Brown had 19 points on 8-of-23 shooting, making just one of nine 3-point attempts.

Still, the totality of his time in Boston has made him a key piece of the franchise's current core that management wasn't willing to risk seeing depart when his current four-year deal expires after next season.

From the moment this past season ended, Celtics president of basketball operations Brad Stevens has been adamant that he wanted to see Brown sign a long-term deal.

"He's a big part of us. We believe in him and I'm thankful for him," Stevens said last month. "I'm really