You're out of your head if you think Rondo will sign here after Danny Ainge told him that he'll build around him only to trade him.
Yoki... how does sending him to Dallas for a couple months prevent us from "building around him"?
Look I'm going on record here. If Rondo doesn't sign with Boston this summer it will prove we were right to trade him. If he wants to be the leader in Boston, he can be the leader in Boston this summer. We didn't have a team here for him to compete this year. He can go have some fun in Dallas, we'll regroup and try to put a team together for him to compete with next year. We still have cap space, it's the same teammates, it's the same coach, it's the same fans and city... If we were in good position to sign him before the trade we are in even better position after.
I think it would be too harmful to both ours and Rondo's image to try and resign him. Everyone will think and claim, as The League puts it, collusion by Rondo and the C's to get a few extra assets out of a trade.
Pretty sure there is nothing at all preventing us from doing it.
The league prevents it from happening in-season. Ainge once traded Gary Payton and then after Payton was waived he signed back with the celtics within a month. They prevent that now... but as far as I know, come the start of free agency, there isn't a single thing preventing us from calling Rondo and offering him a max (non bird right) contract. And why wouldn't Boston do it? If Ainge doesn't offer Rondo a contract it suggests we never wanted Rondo in the first place.
If Rondo turns down the offer, it suggests we never were the favorites to sign him and we were smart to get something for him while we could.