I was reading "NBA Chemistry: Positive and Negative Synergies in Basketball" (
http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1935972) and came across an interesting bit of info.
Basically the research in this paper evaluates players based on the type of skills they offer and how effective those skills are in impacting the game. It seeks to find sets of skills, and therefore specific players whose skills work well together.
One way the data can be used is to apply a value over replacement player similar to way players are compared to replacement players in other sports metrics, and which in this case is measured specifically in Points Over Replacement Player (PORP). Again though, this research takes everything from standpoint of specific skills (ballhandling, rebounding, or offense/scoring). They used data from I believe 2005 or so to 2010. In that time period the player with the highest or "Best" PORP for Defensive rebounding was Jason Collins.
It is interesting that this research reaffirmed and provided data to support notions that might already be widely accepted in basketball, that certain skills work better with certain other skills. The game is not about finding the best five shooters, or the five strongest or tallest players and putting them on the court in the same lineup. The researchers were interested in synergy among lineups and provided evidence backing the thought that, for instance, teams with one really good ball handler don't need another one in the same lineup. Common sense, maybe, but also perhaps too commonly overlooked.
The Celtics since 2007 have had one of the very best FG% in the league, and even last year were 5th overall at .460. Teams that shoot the ball well happen to benefit the most from good defensive rebounders (whereas good offensive rebounders are often wasted in systems producing good FG%). The Celtics wanted another big man and desperately needed defensive rebounding. Did the Celtics take a look at synergy in evaluating Jason Collins' fit with the team and try to maximize a needed skill at a low salary? It would seem so. Maybe a smarter move than most of us have realized.