US Lacrosse membership is required for participation in our programs and your player must have a US Lacrosse registration current through the date set forth in the registration for each season. If your child's US Lacrosse registration expires before that date or if they do not have one, our system will take you to the US Lacrosse website in order to renew or purchase a membership. US Lacrosse reports: some parents have experienced difficulty registering if they have inadvertently created a duplicate account or if there is a discrepancy in an address, email or birth date between US Lacrosse and LeagueAthletics.com. You should contact the US Lacrosse Customer Support Center.