The MYLA club league was created to coexist with the MYLA Rec league. u11, u13 play on Sundays so that the players can play in their rec games. U15 club games played on Sat because u15 rec games are Sundays. The MYLA club league is organized by grade but not all clubs are. My son is on a "2019" team but all kids are in eligible for u13 events. So I'm sure some teams have hold back kids but not all. Last year teams were restricted to practicing only on Fridays - so that the club league didn't displace rec. They lifted that restriction this year which opened the door for clubs like Crabs whose players don't play rec and practice together 2 or 3 time per week. Also some looneys and fca teams went full time and dropped rec. But most teams are traditional summer clubs with kids who also play for their rec teams.