Sorry to the OP, but according to the salary numbers at shampsports, this deal would leave the Celtics over the salary hard cap. Pressey's salary counts more against this threshold, and Green has incentives which also count. This deal would not be allowable.
Pressey might not exist on this roster- I've included the main pieces but salary fillers and exact picks might have to be moved around.
Key part is we move Wallace, Hump, Lee, Bradley, Crawford, Olynyk.
see here: w/out picks. Trade is 100% doable.
http://espn.go.com/nba/tradeMachine?tradeId=ka63jus
It doesn't matter if Pressey is on the team or not. After your trade, the Celtics are at 12 players. If they get rid of Pressey, they have to replace him with someone who counts at least as much as he does against the hard cap, because they have to have at least 12 players by rule.
Your link to the trade machine isn't working. Just trust me that between Pressey costing $884,293 against the hard cap instead of $490k, and Green having unlikely incentives worth $265k, which also count against the hard cap, that your original deal does not work. The person you need to include in a trade, if you want the C's to keep all the other pieces, is Bogans. Give us back Felton to back up Rondo, since you've traded 3 of our top 4 guards. Then it works.
I mentioned that you could move small parts to make the money work, it really isn't that hard. The tax implications are there but the deal is 100000% doable with Pierce's trade exception on Shumpert. It doesn't work with Chandler or Melo but it goes with Shump and covers about 2 million voiding your concerns about Pressey and Green.
Bogans does work as well but we don't want Felton at $3.6 million when we can send out Brooks and get back Chris Smith and another 500K scrub.
The 12 players is easily doable in multiple ways.
If you want to wait 3 days then we can move Brooks for two cheap Knicks guys to make it work.
2 of our 4 top guards are restricted free agents and we'll be getting back Shumpert whilst keeping Pressey.
Rondo
Shumpert
Green
Melo
Chandler
Sully
Chris Smith
Toure Murry
Pressey
Martin
Bogans
Bass
= 12 players
with Bass being most likely moved and the scrubs being replaced next year.
I'm 110% sure this works because of Pierce's TE creating 2 million room on Shump. In fact we could re-work it with Felton and get more back with the TE, problem is he's 2 more seasons at that deal.