actually there were no 2006 birthdays
Since you are in the know, how about listing the number of birthdays on the Crabs roster by month from January thru August of 2007? No names.
How about how many crabs kids on on roster born between September 1 2007-August 31, 2008. Those are the on age 2026 kids.
most of them are on age, they have 4 holdbacks
That's a clever way of saying the team is almost entirely born prior to 9/1 2007 and it's not against the rules because they are in 8th grade. However, most of those kids delayed entry to school prior to 1st grade and 4 of them actually repeated a grade and are considered a holdback.