To register as a volunteer (team manager, assistant coach, scorekeeper, etc...), you can register your child as a player first. Then go to MY ACCOUNT, click on VOLUNTEER on the left side of the page, click on the "FIND VOLUNTEER ROLES" button on the top right corner.
Select "Volunteer - 2021 Season". It is for both the softball program and the baseball program.
Pick a division that you want to volunteer for, such as "Volunteer, Softball - Majors". Choose the position to sign up, such as "Head Coach"
Put in detailed information, along with your driver's license for background check. After that you should see the Volunteer page again with your volunteer position, it indicates that you have registered successfully. Note that volunteer registration does not require checkout.
There is a section called notes in detailed information for you to put special preferences such as preferred coaches, etc.