Here at 'My Subleague' you can see the subleague(s) you are a member of. You also can leave messages on your own subleague message board.
On the left hand under the header 'My Subleagues' you can open the panel of your subleague.
The subleagues captain can also manage the members here.
On the left hand under the header 'Options' you have the possibility to create your own subleague(s), to join an existing subleague or to remove your profile from a subleague.