This is not going to be an anlaytics-heavy or analytics-demystifying post. This is just a simple inventory of what sort of players the Celtics have on their roster going into free agency and the draft based on that simplest physical tool of all: height.
Height as listed officially on Celtics.com, so at least all the lies are consistent.
6-10 & taller: Faverani, Iverson, Olynyk
6-7 - 6-9: Anthony, Bass, Green, Humphries, Sullinger, Wallace
6-4 - 6-6: Babb, C. Johnson
6-0 - 6-3: Bayless, Bradley, Rondo
5-11 & shorter: Pressey
Just going by size alone the Celtics can use a Ray Allen or Paul Pierce sized player moreso than a power forward or a center sized one. This shouldn't be a surprise to anyone given the way opponents shot three-pointers against Boston. Big guards and quick forwards were the bane of our existence. The good news is that the players who fit this bill are very likely to be availablee in the 5-8 range in the draft: Dante Exum, Gary Harris and James Young. As well as down at 17, where talents such as Zack LaVine, Jordan Clarkson and (my personal sleeper pick for an exceptional pro career) Glenn Robinson III can be had.
Better still is that it might be that some of this swingman talent will allow Danny to do what he loves best: trade down a little and pick up more draft picks.
This leaves the prospect of upgrading at power forward or center to a trade (I discount free agency simply because the Celtics have never landed a big-name FA during Danny's tenure). If I had to make a guess, the most marketable package right now would involve a future first rounder and Kris Humphries.