User blog comment:Alois-pyon/Edolas Makarov/@comment-89.240.103.113-20130221171715

Maybe all the strongest people in Earth-FT aren't in the guild. Erza wasn't, we didn't hear about Gildarts and technically Mystogan wasn't in it. We could assume that Makarov wasn't either, especially since there is no refference to Makarov actually being the master of FT.