JO is pathetic, but Doc wouldn't demote him for a D leaguer. JO should be banged up soon, and that will give Doc the excuse to start Steamer. He's a better defender than Semih right now, with a lot of upside as a defensive stopper.
Unless the marketing department has some kind of deal with Charmin, the Cs need to do something about their defense in the paint. JO, with 13 fouls in 60 minutes, and almost no mobility, is a joke as a starting center.
JO was poor as a starting center when we faced Miami two seasons ago, and he seems like a worse player now. Ugh. The question is if Ainge is still delusional enough to think a FA will want to sign here this summer, thereby not trading expiring JO for someone useful on a longer term deal.