Please, explain American sport system to an European
I guess this board could be as good as any for me to finally ask this question. I'm almost 40, and I've watched dozens of American sport films (far more than European, seems Europeans do not make sport films that often), mostly about football and baseball, but also about basketball and hockey. But, still, I didn't grasp how the system works. Now, the question is, to put it simple: what is the road for a boy in USA to become a professional player (NBA, NFL, MLB or NHL)? Does it always has to be through high school and college? What happens with players who finish college, but do not make it to professional league? I have more questions, but let's start with these.
Here I'll add a short explanation of the sport system in my country, which is basically the same in all of Europe, at least with soccer or basketball. First, it is usually not connected to the school system in any way. You sign your kid with a club, which could be some little town club, but also it can be national or European champion, depends where you live, how much money you have or how talented your kid is. He starts with U-12 category, then he advances to U-14, U-16 and U-19 or something like that. But all the time in the same club, unless you move it to another club by yourself. Also, doesn't have to wait to be 18 to become professional, if the club finds him to be ready to compete with others at professional level. When he reaches 18 years he can sign for any club in Europe which shows interest or offers enough money. All the professional clubs are obligated to have in their structure all those different age levels. League system is unified in the whole of Europe through the promotion/relegation system, so a team from a little village can theoretically advance in several years to become European champion (but just in theory, practically not possible, unless you have a billion dollars to invest in players and club infrastructure). This is oversimplified version I laid there, but basically this is how it works. So, please, try to explain how this works in USA, and be detailed as much as you can. I hope we'll have nice and informative discussion. Thanks.