[Goose]

As better nutrition (and perhaps the indirect effects of hormone-influenced beef take effect on kids--mostly kidding), the big kids get bigger...and those who would have kept playing in earlier years might be taking notice of the size difference and deciding that no, they'd rather not go toe-to-toe with very large players every day in practice.

I think you are absolutely correct. These bigger guys are also, I think, much more skilled at an earlier age due to more and better coaching, so an "average" person who is not totally dedicated to football isn't wanted.

[Goose]

As better nutrition (and perhaps the indirect effects of hormone-influenced beef take effect on kids--mostly kidding), the big kids get bigger...and those who would have kept playing in earlier years might be taking notice of the size difference and deciding that no, they'd rather not go toe-to-toe with very large players every day in practice.

I think you are absolutely correct. These bigger guys are also, I think, much more skilled at an earlier age due to more and better coaching, so an "average" person who is not totally dedicated to football isn't wanted.