This isn't in the OP's league but...
Maybe I figured it out......OP you are the commish, are you 'acting as...' the team you are trying to change...or assigned to the team? It seams if I am commish (not acting as I don't get the MLB roles but if I 'act as...' the team they show up.
As Commish but Not GM of the team or 'Acting as..." GM of the team I get this..
As Commish and 'Acting as...' as GM of the team I get this...
