9. D'Angelo Russell
D'Angelo Russell was commonly thrown into trade rumors this summer when discussing the possibility of the Los Angeles Lakers making a move for Kyre Irving.
The Lakers re-signed Russell to a two-year deal this offseason, but just like Irving, he can be moved after December 15.
Last season in Los Angeles, Russell averaged 17.8 points, 3.0 rebounds, 6.2 assists, and 1.0 steals per game. He would be more than capable of filling in the starting guard spot in Dallas next to Doncic, and a trade for him would also likely include another asset.
If a team were to make a move for Irving, it seems like Los Angeles would be a front-runner as there were rumors all summer that Irving and LeBron James wanted to team up. It was reported that Irving tried to recruit James to Dallas, but since that didn't work out, maybe James will push for his team to trade for Irving.
James and Irving were one of the best duos in the NBA during their time in Cleveland, and they won a championship together in 2016.
This trade would give Dallas an immediate plug-and-play guard to slot in next to Doncic, and could land the Mavs some draft capital as well.