Hi. I just spent about three days compiling logos for every league in my graphics logo_league folder. Much of this time was spent researching what league the logo was for, because it wasn't always immediately obvious due to naming format differences, foreign languages, etc. In some cases, I couldn't find anything and did the best I could to substitute. In other cases, I had multiple options and went with the choice I thought best. If you find errors, please let me know and if you have the correct logo, post it in this thread and I'll update the linked folder.
I've been working on teams, but there are at least 4x more team logos than league logos, so that will take some more time, especially as I have to convert them to PNG when they are not in that format already, frequently remove backgrounds, and almost always resize the images to 150px x 150px. Just these 200 or so league logos took me most of three days between the research and the file editing.
Logo Leagues
You probably all already know, but in case you don't, you have to drag these image files into the logo_leagues folder in whatever save game you are currently playing, replacing the files that are already in that folder. For me, for example, the folder is at:
C:\Users\
(your user name)\Documents\Out of the Park Developments\Franchise Hockey Manager 6\saved_games\
(your save name).lg\graphics\logo_leagues