AAU Basketball just changed their eligibility to restrict birthdays and many kids found out their old team did not want them. They put in some grade based grandfathering for older kids, but not younger (U-14 or less).

(Example: 15U/9th Grade: An athlete can be no older than 15 on August 31, 2015. Grade Exception: An athlete who is in the 9th grade as of Oct 1, 2014 and who is no older than 16 on August 31, 2015 is eligible to play in the 15U/9th grade division)

It is too late for the 2020 to be affected by a stricter rule change, but there is hope for my 2025. Hopefully, lacrosse can get their act together.