User blog comment:Dettles/Doflamingo's Past/@comment-5729687-20130330035518/@comment-5962458-20130330171936

Well my point is that the one who cut Z's arm became a sichibukai one year before the present time.All the other known sichibukais have their status at least for two years now. With the only exceptions being Law, who is too young to have cut the arm, and Buggy who is too weak to do it.

I hope i 'm clear now.