I think RZ made some great points, but we shouldn't ignore Linear's. Location can be taught or practiced from a younger age when velocity just hasn't really arrived yet. Movement is a result of grip and good mechanics. When the thrower does finally grow into velocity, it can be a wonderful combination. However, we can teach young throwers to pitch a little more since not all are created equal and only a few will have dominating speed. When a thrower does possess exceptional velocity, and doesn't control well, its never too late to put him on a program that works spots. He can also be taught alternative grips to enhance movement. I'll take either, or both. It gives a staff a nice makeup. like to see kids rest for 6 weeks or so from mound and full velocity workouts. However, some long toss can be beneficial. The weight trainng is essential and so is running.