you must be a rocket scientist - this is from US Lacrosse web site -
U13: All players must be 12 years old or younger on the August 31st preceding competition. It is recommended that when multiple teams exist within a program, the program should consider physical size, skill, and maturity when organizing teams.
So if you do the math, no kid should be 14 as of this past weekend, and we all know that wasn't the case in the 2019 brackets.
