Bryce Harper was another and he makes a nice segue to a point I want to make. If a kid is looking at the next level, I see no real problem with pitching and catching if his future is as a position player (catcher or otherwise). However, if he hopes to move the next level as a pitcher, get him out from behind the plate. Usually, by the high school level, you won't see stud pitchers catching at all and when you see a catcher also pitch, it's in a support role - not a heavy workload. At lower youth levels, it's sometimes overdone. My worry isn't with the arm, though. It's the risk of lower body fatigue.