The agreement includes a player option for the second year of the deal, sources told ESPN.
A second-round pick in 2018, Brown carved out a unique role on the Brooklyn Nets the past two seasons as a versatile defender who played like a big man on offense despite his 6-foot-4 frame.
Brown, who turns 26 on Aug. 15, was used primarily as a screener and rim-roller for a talented Nets team that did not require his ballhandling skills. The role helped Brown shoot over 50% from the field the past two seasons.
Brown improved as a 3-point shooter last season as well, hitting over 40% of his 3s on 1.3 attempts per game. He was one of Brooklyn's best players in its first-round series loss to the Boston Celtics, averaging 14 points while shooting nearly 57% from the field and 42.9% from 3.