Nugs don't have a real backup PF and won't be able to pay Brewer next year when he's a FA.
Raps clear a little space, clear logjam at PF, get a solid wing and 3rd pg.
Not a sexy trade by any means but would help both teams i think. Between Fields and Brewer you'd pretty much always have a great wing defender on the floor.
Im a big Brewer fan