Public Leagues:
Yahoo! Sports has the ability to lock certain aspects of a manager's activities in accordance with our Terms of Service and fair play rules based on actions taken within the league.

When a function has been locked, the lock remains in effect for the remainder of the season.

Custom Leagues:
The commissioner has the authority to lock any team at any time without warning or explanation. If your team has been locked, you can try to contact the commissioner via the league message board (if posting privileges remain) or through the email address displayed on the Team & Manager List page.

The commissioner isn't obligated to respond or to justify their actions. Yahoo! Sports does not interfere with Custom League matters. Yahoo! Sports won't restore access to teams that have been locked or contact league commissioners on behalf of locked members.

Because the commissioner has full authority over Custom Leagues, it's a good idea to choose your Custom Leagues carefully.