Here is an example of a league, that wanted the players to know if they were an A, B or C, 
This is what it looks like :

Some to this for leagues that have a master, a spare, a rating of some sort. Etc.

To do this:

You want to go under Players. (Menu > Manage > Players/Teams > Players)
Choose a Division.
Use a Custom Value Column to insert what you want to appear next to the player's name.


Then under Round-Robins,  (Menu > Manage > Bracket/Round-Robins > Round-Robins)
Pencil to edit, 
Public visibility section,
Choose the column you used.