The Mavs solidify their last starter, one that fits their system perfectly - great defender and a good shooter (40 % +) and a legitimate 3 level scorer. Portland sheds Grants huge contract and gets great rebuild players and picks. THJ is an expiring contract in the off season, so POR gets a lot of flexibility that they should be desperate for if they want to complete a rebuild in this stacked western conference.
Note: ik that Mavs cant trade both of those picks, but you can't select other picks in Fanspo, so just consider those as any 2 FRPs