Assuming it is a playing time issue I have two questions (and if not, I hope all is ok in personal life!):
1. Is there any downside to waiving him after the trade deadline? I can understand why DA wouldnt do it earlier in the season or immediately, as you never know about injuries and you may want him as an expiring trade chip, but with Rondo's return and after Feb 15, are there any implications?
2. If DA negotiates a buy-out, as opposed to just waiving him, do we save the difference for luxury tax purposes? Similarly, if he is waived and picked up by another team for the rest of the season, do we get any tax relief?
The first year of the contract for a player acquired via sign-and-trade must be guaranteed for the first season. I think this is something that cannot be negotiated (since it would make for easy salary cap circumvention). Since the Celtics do not have a full roster, they do not benefit that much from gaining an empty roster spot by waiving someone with a guaranteed contract.
The Celtics are under the luxury tax threshold right now, so there is no tax relief to be gained by waiving him.
If he is waived, the Celtics are on the hook for the guaranteed portion of his contract, unless someone claims him (which no one will do).
Basically, waiving him doesn't save any money, doesn't open up a roster spot for another player, and gets rid of a potentially useful asset.
If Bogans was being a team cancer complaining about playing time, the Celtics would probably find a way to suspend him for violating team rules or conduct detrimental to the team and tell him to stay home until traded (or waived before he gets paid under the second year of his contract, should no trade be available).