You never know when TA would end back up in Doc's dog house. Although I hate to see him go, it was probably a good move for Tony.
This is surely true for TA, as it is for Quisy, BBD at times, Scal, and almost every person on the roster from the 7th spot on down. [Sheed, in the 6th spot, was safe...]
It makes me wonder whether uncertainty regarding minutes would discourage FA's from coming to Boston, especially since we need some minimum-contract rotation players?
But I also believe [for whatever reason] that Tony thinks he can play more than 15-18 minutes. I disagree, and think his value is highest when his role is most limited and most clear. Perhaps this is similiar to Ariza going to Houston for a bigger role?
Another theory: Tony was sick of all the chatter over the years about the team needing things like a stronger bench (when he was on it), tough defenders, a scorer off the bench (which he had done in the past, pre-injury, when we sucked), and decided to go where he was appreciated more.
Yet another theory: Memphis is closer to his "Sweet Home" Chicago, easier to get to, and has a much lower cost of living? Memphis better living than Boston?