Will, I'm not so sure it has to do with being fragile. I think it could be a couple of reasons. One being that the kid has learned (by whatever means) that his future is pitching and thus decides to only be a Pitcher. Another would be the size of the HS and how many tryout/play. In our HS, we NEED our Pitchers to play another position when not on the bump. We need his glove and bat mostly, and hope he doesn't have many ground balls hit to him during the game!