I think in reading over lodi was talking about HIS shoulder, not sons. Sorry 'bout that confusion.
Two things you have to do, three actually, work hard on the field and in the classroom, and remain healthy. The rest will work itself out as your player gets older. Things change dramatically from middle school to HS.
My son was a pretty good ball player and student in 8th grade, how the heck would we know where things would be when he was 17,18? College was the furthest thing from his mind. And I think at that age he was going to be either a pro golpher, or pro bowler, or the next David Copperfield (into magic). Let your kids be kids, they won't have so many issues when they become adults. That's the problem with parenting these days, they are planning their kids future after just arriving out of the womb.
But that's my opinion as an old timer..... you know one of the ones you may have learned from.