[ChuckElias]

You should have a conversation with whoever assigns the league about it. If s/he doesn't mind your affiliation with some of these players, then you shouldn't either. If the assignor feels that -- for appearance's sake -- it would be better if you didn't work them, then that settles the issue too.

I taught part-time at a local community college for a while and was assigned to do one of their games. I immediately called the assignor and he said he didn't mind, but that if I ever got hired full-time, he would no longer be able to use me there. Fine with me. Be up front with the assignor and let him/her decide.