From the 2019 thread:

PLEASE READ from EDGE Lacrosse website:

Fall 2014 - Edge 2020 Team (2001/2002 Born/U13)

The 2020/U13 age will be a mixed age of the top 2001 and 2002 born players. This is due to early reclassification of our 2018 and 2019 teams as they enter and prepare for FRESHMEN and Rising Freshmen events. Reclassification is the process in which a player competes in their PG (Post graduate) age division as opposed to their natural 4 year grad year. This is due to US players starting school a year later or staying back a year prior to entering high school. This results in US born players to be a year older as we enter high school. With early recruitment becoming increasingly common among the top DI schools, it is important for our members to reclassify in grade 8/9 in order to compete against similar aged US counterparts. Reclassifying provides our members with the best opportunities to be recruited by the top DI programs in grade 9 and 10.