Josh Smith $13 mil (expiring)
Devin Harris $8 mil (expiring)
Ivan Johnson <$1 mil (expiring)
Ryan Hollins <$1 mil (expiring)
Deandre Jordan $10 mil (3 yrs)
Caron Butler $8 mil (2 yrs)
Eric Bledsoe $1.7 mil (2 yrs)
Kevin Garnett $10 mil (3 yrs --> but perhaps retiring soon)
Jason Terry $5 mil (3 yrs)
Brandon Bass $6 mil (3 yrs)
Biggest sticking point is how much the Hawks really covet their cap space. To those who would say that DJ and Horford play the same position, I would respond that Horford could play PF, too, and do just fine. Bledsoe, Teague, and Williams are not necessarily totally redundant, either. I think that could be a fine three guard combo.
The Clips get pretty darn good this year, in my opinion. You could replace Jason Terry in the trade with Courtney Lee, if you think that makes it more realistic / palatable for the Clips.
This is a way that the Celtics could get something in return for Garnett and still be somewhat competitive this season. Gives them a ton of cap flexibility moving forward.