I don't know if I'd do it, but I think it's intriguing to consider rolling the dice with him getting him when he's waived.
We have a lot of cap flexibility as it is, so I don't know what opportunities might be missed with the amount of cap space he'll command, if any... with a rebuilding team, what star/talented players who'd command big money and want to play here would we miss on? Particularly when you consider that to have cap space next year you have to renounce on the TPE's anyways.
Then you have tools like the stretch provision to manufacture cap space if needed (stretching Wallace's contract) for a minimal cap hit for 3 years.
Then you consider that you have only 8 million guaranteed from 2016 and on, with a climbing salary cap.
To me the most important aspect is the 2015 free-agency and the outlook you may have on drawing big talent to the Celtics.
Beyond that we have excessive cap space, and for all intents and purposes Sanders would be on a short 2 year deal by then.
So those are the things I'd be weighting.
Beyond that, what's the risk with Sanders? It's a substance abuse issue with marijuana. What's the NBA policy for a 3rd strike and on? What protections do the Celtics have if this continues?
I don't know the answers to those questions, which I think are the most pivotal. He's been playing well this year from the limited times I've seen him play.
Aside from that, sometimes is good to have a player with a weighty contract for salary matching purposes in trades, and it being allocated into a young talented center is not really too bad of a thing... when you have draft picks assets to use as well on top of it.
So in all, I really don't know what the correct course of action here is considering how pessimistic I see free-agency for us next year with no real realized talent on our roster to draw star players. And even then, I don't think that Sanders 11 million would be that much of a hindrance unless you have 2 opportunities of big money players to sign.