It's a very good question indeed.
I don't think he's a max contract player. I don't think Danny will give him a max contract unless he sees something in the practice gym that we don't see on a daily basis.
We'll need to see continued weight loss and conditioning discipline.
If those two criteria are met I think he might be looking at something like 4 years x $14 million.
It's going to be a Rondo type second contract if Sully forces the issue with great starter minutes. That will take losing some more weight or at least not putting any back on, and proving it on the court. Rondo got $11-12 million, so inflation probably bumps that to $14 million. He is not worth any more than that, 20 rebounds or no 20 rebounds. Unless he keeps piling those up and plays well. Then maybe he is worth $16 million per year. But we are still waiting to see if it is true he is worth it.
Rondo was not a perfect pg, but he was right below the near perfect ones and he had a style the team wanted with the efficiency to merit a good contract.
Basically there is no way to tell. His good play is what's keeping this question alive. He started on the bench, yet now he's one of the best reasons why the team is succeeding.
I think he still needs to lose twenty to thirty more pounds rather quickly or Ainge might be like us and be skeptical he can maintain great play while overweight and then Danny trades him.
It's up in the air.
I'm always very happy to eat crow and I do hope Sully can play even better than he has. He should talk to Pierce who used to overeat too. Paul Pierce understands. Does Sully? He seems to still have some weight to lose. If he can't or is unwilling to because he thinks he needs to be fat to defend the paint, then I doubt he remains as a fixture.
Some games he looks like he is on his way. Others, he still looks too overweight. That could be bloating.
I'll assume he and the C's have a plan for his conditioning and the expectations. It did seem a bit odd he didn't lose more weight to start the season. Photos in the summer hid his weight with tight athletic clothes. I also found it suspicious that Sully never said I wanted to lose 40 but only lost half of it. I weigh such and such. Etc.. Why the big mystery? It shouldn't be that difficult for someone to lose weight and tone at age 23ish, especially when one is exercising all the time. I don't understand the delay for Sully to get in shape.