I'm not going to question anybody's parenting because you know your kids better than anybody. I think specializing prior to middle school is not such a good thing. Sorry to say it, TRbell, but the chances of being a state or national champion is slim regardless of whether or not you son plays football (or any other sport). I'm not saying he's not talented enough, because I have no idea who he is, but it's just long odds for anybody. Specializing early may or may not get a kid to that level, but good luck to your son.
I see posts on facebook from people that have young kids (1st - 2nd grade) that say how worried their kids are about their diet because they have a better chance at a lower weight. Completely ridiculous at that age.
I was always a multiple sport athlete (lettered in 4 sports in HS) and went one season at a time. Wrestling was winter only for me, with an occasional freestyle tournament during the spring. Freestyle pretty much stopped in HS because that was baseball season. I was a state place winner. Could I have placed higher if I had specialized in 3rd or 4th grade? Who knows? But I sure had some good times with my baseball, football and soccer teams that I probably wouldn't trade for a couple of extra spots on the podium.
The problem I see is the parents. Again, not pointing fingers to anybody here because I don't know any of you. But I think parents want little Johnny to be the next Nick Lee or Brayton Lee, or Lebron or Bryce Harper and they sacrifice a lot in the hopes of essentially hitting the lottery. Saw a post on FB the other day of a young kid (2nd grade I think) at batting practice with the caption "Putting in work because college is expensive!"