The Mavericks signed Powell to a three-year, $12 million contract Saturday, Adrian Wojnarowski of ESPN reports.
Powell has spent the last nine years in Dallas after being traded by Boston during his rookie year. The 31-year-old big man started in 64 of his 72 appearances in 2022-23 and averaged 6.7 points and 4.1 rebounds in 19.2 minutes.