This article describes how to delete your team from a group, and explains that it is not possible to remove yourself from the game entirely once a team is created.

Please note that it is not possible to remove yourself from the game entirely once you have created a team. We apologize for any inconvenience this may cause you. However you can remove your team from a group by following these steps:

1. Return to the Yahoo! Sports Fantasy Racing homepage.
2. Click Leave a Group located in the My Groups area. You will find a list of groups you have joined on the following page.
3. Click Remove me from Group to leave any group. There is no confirmation screen, so click this link only if you wish to leave a particular group.