All im gonna say is up and down youth sports you have teams fielding kids they know are too old or large to play in their age group and coaches try to find ways to get around it. When my sister ran track you had people always having to prove their kids age with birth certificates or other documents. One year a chick who ran on my sisters team the prior year was spotted running for a rival team so we all knew she aged out. Luckily my sisters coach still had that girls birth certificate in his folder and busted the other team out. They were pissed, it was seriously about to come to blows.
When i was kid playing football the refs had to have a scale on the sideline because coaches would try and sneak these big ass kids in the game at RB so they could just blow us up. Had to weight them cats on the sideline to make sure they were eligible. In most cases where there was a challenge they weren't eligible.