It's remarkable how much of Boston's rotation was drafted by Danny Ainge.
Horford, Theis, and White were acquired in trade. Everyone else was added by Danny's management team in the draft. At this point, Boston's 10th man, Aaron Nesmith, was also acquired by Ainge in the draft. Whether he'll be in the playoff rotation or not is uncertain at this point, although for the next few games at least we can expect that he'll get some run.
I think, btw, that Nesmith is currently undervalued by fans; that he's got the skills to crack the rotation; and that there's a slot available for him as the third wing.