The Dallas Mavericks have agreed to acquire Grant Williams in a three-way sign-and-trade with the Boston Celtics and San Antonio Spurs.

Williams gives the Mavericks a young, versatile 3-and-D forward. Wiliams is represented by Erik Kabe and Bill Duffy. Duffy also represents Luka Doncic. 

The Mavericks will send Reggie Bullock and an unprotected first round pick swap in 2030 to the Spurs.

The Celtics will receive two second round picks and a $6.2 million trade exception. Dallas will also receive two second round picks.

San Antonio, meanwhile, gets itself to the salary floor by acquiring Bullock.