User blog comment:Staw-Hat Luffy/Dat Blind Guy/@comment-6047553-20130307063223

I think he's a shichibukai for in chapter 700, the commodore only mentioned 6 of the shichibukai. http://www.mangahere.com/manga/one_piece/v60/c700/15.html he even said "including the person i mentioned earlier". so i would think he's probably a shichibukai. only a hypothesis :D