Oda drew Shichibukai members as kids

In the SBS of Volume 63, Oda drew all the known Shichibukai at the time (including former members) as children. Trafalgar Law was not a Shichibukai then, but he was drawn as a child along with the rest of the Eleven Supernovas in the next SBS and his past was revealed. Buggy and Weevil are the only confirmed Shichibukai to have yet be drawn as children.

D: “Odacchi sensei!! Hear me out!! Please draw the 7 Shichibukai who made Luffy and Whitebeard suffer two years ago in the battle at Marineford as kids!! P.N. Harada Yutaka”

O: “Yeah. Sure-. Now I wonder how they look two years later~~. These are the ones that were in the Shichibukai at the time before the war actually began.”