as long as he's playing and not a bench player, travel ball is the way to go. be clear with the coach that he will throw no more than 8 innings in a weekend PERIOD, and one appearance during the week. that is the maximum useage.
usually you are as good as you ever will be by the time you are 24-25. bonds got better but there are some theories why he got that much better late.
williams hit 406 at 23 and brett hit 390 at 25. that's only 8-10 years from you. time to get started. he needs 10,000 hours of directed practice which takes between 7 to 10 years to complete if he wants to be one of the best. if he's starting travel bal at 14, that is normally a late start, but can be done. clemens did it but worked obsessive once he started.