Removed sports team from Google Now keeps reappearing I added few teams to Google Now to see how it worked.

Now I left San Francisco and I don't give a * about the Giants' score.

I tried to remove the team by going to settings, clicking on the team, remove.
The team is removed but after a few minutes it reappears.

I have two devices running Jelly Beans so I though it was a synchronization bug. 
I removed the team on both devices at the same time, but it still keeps reappearing.

How can I definitely remove it ?

Edit: My Galaxy Nexus is running 4.1.2 and my Asus Transformer Infinity is running 4.1.1.
According to the Google Now page sports cards are : 


  Shown based on Web History


so I suppose there are still many links related to the Giants in your web history.

Try to go to your google history page, search for everything related to Giants, then remove the shown items, then maybe Google Now will understand that you are no longer interested in Giants results.