The following information will give all coaches some ideas on different drills that they can utilize at practice. As a reminder, if the purpose of the drill is to work on specific mechanics it is more beneficial to concentrate on the quality of reps rather than the quantity of reps.
Arm care is extremely important for young pitchers. Science says arm problems experienced by high school, college and pro players are often caused by overuse or incorrect use as youth pitchers. MLB's Pitch Smart program provides the best guidance for coaches and parents to help reduce arm injuries.
MLB Pitch Smart
NFHS Introduction to Pitch Smart