The Dallas Mavericks have acquired restricted free agent Grant Williams from the Boston Celtics in a three-team trade, the team announced. Williams signed a four-year, $54 million deal before being dealt to the Mavs, per Shams Charania of The Athletic.

Mavs receive: 

• Grant Williams
• 2025 second-round pick (via San Antonio)
• 2028 second-round pick (from San Antonio)

Celtics receive: 

• 2024 second-round pick (via San Antonio)
• 2025 second-round pick swap (via Mavs)
• 2030 second-round pick (via Mavs)

Spurs receive: 

• Reggie Bullock (via Mavs)
• Unprotected 2030 first-round pick swap (via Mavs)

The Dallas Mavericks have acquired Grant Williams from Boston and second-round picks in 2025 and 2028 from San Antonio as part of a three-team sign-and-trade deal. pic.twitter.com/e08cvde6zF

— Mavs PR (@MavsPR) July 12, 2023

Thank you, @Grant2Will, for embracing our city as your own, for being a champion in our community and for giving it your all every time you stepped onto the parquet ☘️

📝: https://t.co/9ipF9PNeje pic.twitter.com/WpPpvE7hkP

— Boston Celtics (@celtics) July 12, 2023

The Mavericks are acquiring Celtics restricted free agent Grant Williams on a four-year, $54 million deal via sign-and-trade, per sources. WME Sports’ Bill Duffy and Erik Kabe completed the new contract for Williams. https://t.co/5T77dCuMkA

— Shams Charania (@ShamsCharania) July 5, 2023

The Mavericks made it clear they thought their roster needed work after missing the playoffs when the pairing of Luka Doncic and Kyrie Irving faltered in the two months after the blockbuster deal that brought Irving from Brooklyn in February.

Irving and the Mavs have agreed on a reported $126 million, three-year contract that should become official when free agent deals can be signed, starting Thursday. Center Dwight Powell also is set to return.

The 6-foot-6 Williams will change the look of the Dallas frontcourt with the lanky, offensive-minded Christian Wood not expected to return. The 24-year-old averaged career highs of 8.1 points and 4.6 rebounds per game in his fourth season with the Celtics.

Dallas wants to rediscover the defensive mentality that helped fuel a run to the Western Conference Finals in 2022. But it will have to be with a new set of key defensive pieces. The departure of Bullock comes after Dorian Finney-Smith went to the Nets in the Irving deal.

Overall in the offseason, the Mavs made moves to round out their depth — a sore spot for the team in 2022-23. Aside from deals for Powell and Irving, Dallas also agreed to reported deals with Dante Exum and Seth Curry and reportedly offered restricted swingman Matisse Thybulle to a three-year deal.

Bullock averaged 7.2 ppg for the Mavericks last season, a drop from 8.6 in his first season in Dallas. The 3-and-D specialist shot 40% from 3-point range in the 2022 playoffs, making 2.9 per game before dropping to 1.9 at a 38% clip in the 2022-23 regular season.

For Boston, this trade adds to its growing stockpile of future Draft picks. The Celtics added four second-round picks on Draft night when they traded down from the No. 25 overall spot multiple times. Per the Boston Globe, the Celtics also added a traded player exception worth about $7 million in the Williams deal.

Information from The Associated Press was used in this report.