THE CELTICS haven't been this green since 2006. Losing Kevin Garnett and Paul Pierce left them with just one above-average player -- Rajon Rondo -- and he's coming off ACL surgery. Last season's sixth-ranked defense should fall sharply with Kris Humphries ('12-13 DRtg of 105) now the "anchor." Only the Suns and Sixers project to struggle more on offense. To echo ex-coach Rick Pitino: Andrew Wiggins had better be walking through that door.