So based on all the reports, the 'young player' is likely Davis. So Memphis gets: (whoever in place of) Calderon, Davis, and a pick.
It's very tough to make the Cs the 3rd team. The only player who could be traded by himself for Calderon in this scenario is Green, which is dubious at best. I also have my doubts that Ainge would want to do that anyway.
If not Green, Memphis is unlikely to want any of Terry, Lee or Bass, much less a combo of two of them, which would be needed here.
The trade would have to grow for the Cs to be a fit.