Aldridge, 35, agreed to a contract buyout with the San Antonio Spurs and joins a Nets roster loaded with talent as it pursues the franchise's first NBA championship.
The Miami Heat had been a strong contender for Aldridge, but he decided to accept the Nets' offer of one of the franchise's two remaining roster spots on Saturday, sources said. Aldridge joins former All-Star Blake Griffin as frontline reinforcements signed off the league's contract buyout market.
Aldridge is expected to play a majority of his minutes at the center position. His arrival could impact playing time for center DeAndre Jordan. Second-year forward Nic Claxton has been impressive on the frontline recently, too.
Aldridge hasn't played a game since March 1 against the Nets. The Spurs and Aldridge agreed on March 10 that they would separate until a trade or a buyout could end his six years with the franchise.
He has averaged 19.4 points and 8.3 rebounds in his 15 NBA seasons, which included nine years with Portland.