User blog:Neetaku/A New Character?

So, today I was randomly looking up information on the Attack on Titan anime when I found something interesting: in FUNimation's announcement of the English cast for AOT, a character we don't have a page for named Mobb is reported as being voiced Matthew Ham. I was wondering if anyone on the wiki had any information about this?

EDIT: I also found in another one of its cast announcements (they released, like, five different announcements over the course of a week, each with around eight characters and their english voices), a character called "Waltz" who is voiced by Kyle Phillips. However, like Matthew Ham, Phillips is never credited in the anime for voicing a specific character, but for providing "additional voices".