I'd try to do it during fall practice. That way you have a chance to see the team and coaches in action. Teams schedule fall practice at different times, so you'd need to check. A lot of them will be wrapping up toward the end of October.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .