the moment the kid starts bending his elbow funny prohibit him from throwing for a while. nothing worse than getting elbow tendinitis from throwing too hard...
also, don't let him throw too many curves/sliders... stick to fastball, straight change -- the others are just toooo hard for young arms.
Give a man a fish and he'll eat for a day, teach a man to fish and he'll drown because you forgot to teach him to swim.
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