I'd like to add, since we're using stats besides win/loss to decide whether or not players suck, that our BEST 5 man unit this year has been Williams/Miles/AK/Sap/Jefferson, outscoring teams by +66. We're definitely not bad anytime Jefferson steps on the floor. Ridiculous.
Is anybody really saying that "we are bad anytime Jefferson steps on the floor"? I don't think so.
What I'm saying (won't speak for anyone else) is that net -10.9 points per 48 minutes is subpar for a starting center.
What your post does point out is that while Jefferson's underperformance is a problem, Bell's underperformance might be a bigger problem.
Despite my pounding the table for more minutes for Fesenko (and sometimes Elson), it would seem to me that it would be even more obvious to the coaching staff how often CJ has been a crucial x-factor in helping the team stay in games--and how often Bell has been a net liability (even more so than AJ, even though AJ has been a slim net asset, on average, vs. the opposing center).
If there's concern about taking out the scoring from the second unit by putting CJ in the starting lineup where he should be (and bringing Bell off the bench), then bring Millsap or Jefferson off the bench and start Elson (I'm a realist; starting Fes ain't gonna happen). But speaking of realism, I'm not expecting Sloan to ever do this, even though it's a solution to boosting the paint patrol in the starting lineup, reducing the stagnant starts, and keeping the defense and scoring strong in the second unit. I imagine that Sloan might consider slipping Okur in the starting lineup, but I still don't know which of the two he would "demote." Because Sloan preaches accountability but doesn't enforce it. Jefferson's effort (especially in rebounding) has not merited his 30+ MPG (sometimes 35+), but he is still there, as a starter with lavish minutes and a free pass.
BTW, all of you hyperbolers (hyper-Bolers?) who are extrapolating the logic that Elson or Fesenko should play anywhere close to 30 MPG are being disingenuous. For a while, my mantra has been 10+ MPG each for Elson and Fesenko; and closer to 15-20 minutes if they are doing well. Until Okur returned, this still would've allowed Millsap and Jefferson to average at least 30 MPG each (although it should be more like 30 minutes plus only if they are perfoming). And even though the numbers clearly show that Jefferson has been underperforming, nobody is saying that he should be DNP. But when he's sucking out there, he should be pulled--at least for a possession or few. And if his replacement does better--which they have done, more often than not, as part of a unit that has been far more effective, he should sit a few more unless he shows that he can put for the effort and results that Greg Miller's paying for.