Shooting guard Jaylen Brown has agreed to a four-year, $115 million extension with the Celtics, according to ESPN's Adrian Wojnarowski.
Brown was eligible to sign a rookie extension before Monday's deadline at 6 p.m. ET.
Celtics general manager Danny Ainge and Brown's agent, Jason Glushon, negotiated much of the deal over the weekend in Boston, reports Wojnarowski. The deal marks Ainge's first rookie scale extension as general manager since Rajon Rondo in 2009.
The Celtics selected Brown with the third overall pick in the 2016 draft. He averaged 13 points, 4.2 rebounds and 1.4 assists last season.