Why the Mavs do it: While KP has shown more this year, he's still not the second piece for Luka, Ave is very injury prone. KP doesn't have the rim protection abilities to make this team a better defensive team. A closing lineup with Siakum at the 5 can create a switch everything defense that can really help some of the poorer defenders on the Mavs, especially if they run maxi and dfs. This gives Luka a lot of room to create while adding another scorer that we know can play second fiddle on a championship team. Why the Raptors do it: Siakum has a lot of overlap with Scottie Barnes and has less years of team control and is far more expensive. All of KP's faults are helped by playing on a defense that has probably the best point of attack defensive talent with guys like FVV OG and Scottie. They also could use a spacer like KP on the floor with Barnes lack of shooting. I think KP is a better fit long term, while adding some draft flexibility, getting a young talent like green, and saving 6 million bucks.