Sam wrote:I would encourage the kid to throw as many different pitches as she can. The different releases help to minimize over use injuries, as along as she isn't throwing year round and pitching more than one game per weekend when she is in season.
Limiting her to 2 pitches can lead to overusing the same muscles and joints.
Ditto what Sam said, and make one of her pitches a change-up - not much torque on the wrist/elbow/shoulder. Besides it being one of the most important pitches to master from 10u to wcws.