The current version does not support this. I am working on a new version of the plugin and I'll look into it if I can add some configurable options for this, or add a custom role/capability for this (WordPress version 3.6 will support multiple roles for users, if I am not mistaken).
If you don't want to wait for the new version (to be released in a month or so) you can alter the class-football-pool-admin.php file. The init() function contains the definition of the plugin's admin pages. Search for "administrator" in the code and replace it with "author".