>>i7l+(OP)
I always think of the Little League World Series when I read about stuff like this; these kids are often peaking early and so rarely make it to the highest levels as an adult. This is either because they quit advancing at the same rate or they've destroyed their bodies before they get to high school.
I think there's been like a handful LLWS winners who have done anything in the MLB and even fewer who have reached the top of pros.