Boys between the ages of 8 and 15 are growing and gaining weight as fast as they ever will in their life.

On average, they grow 2.4" a year and gain 10 pounds a year. So in a two year per division system, the youngest average kid (e.g. born 8/31/2002) will be 20 pounds lighter and 4.8" shorter than the oldest average kid (e.g. born 9/1/2001).

If you have an old 1year holdback (reclass born 9/1/2000), that kid on average will be 30 pounds heavier and 7.3" taller than the youngest in that 2 year division. That is huge difference especially at the 8-9 year old range.

Of course every kid is different and these are just averages, but you can see why for the fairest and safest games, the leagues should really limit the age differences - especially from 8-15 years old.

As a parent who has witnessed larger kids breaking smaller kids bones on more than 1 occasion and also seen multiple concussions induced by the larger kids in the U9 and U11 ages brackets, I feel we should work towards enforcing a single year division system with age (not grade) cut offs until the kids are 15 or 16.

Age / Weight/ Height data:
https://edc2.healthtap.com/ht-stagi...ri20121213-30526-1i4c4nq.jpeg?1386569716