I read it as "Ed F. Bang" so I just earched that name and found that there was an Edward "Ed" F. Bang, who founded the Baseball Writers' Association of America and was involved in the game in the Cleveland area. He was sports editor of the Cleveland News for 53 years. I don't know if that makes sense with Schacht and the other, or why he'd be on an image of Greenberg, but maybe this helps?
http://ech.cwru.edu/ech-cgi/article.pl?id=BEFE