SBNation's Drew Garrison published a cool article on the NBA's top 5-man units, and not too surprisingly, the group of Wall-Nene-Gortat-Ariza-Webster was fifth in plus-minus (at +10.4). The article also stated that the Wall-Nene-Gortat-Ariza-Beal unit ranked sixth. Sweet.
What really hurt was a chart in the Wiz section of the article that showed the on-court net ratings of every player on the team. Every reserve player on the team was a net negative, ranging from nearly break-even players like Martell Webster and Al Harrington to double-digit drainers (Chris Singleton at -16.9). We should agree not to discuss the deep hole Eric Maynor dug for the team every time he stepped on the court.
I suspect that this isn't unique to the Wiz -- teams put their best players in the starting lineup and leave weaker players in the bench. But seeing so many large negative numbers really drives home the lack of depth that has plagued this team all season.