I would agree with Cong. 62 is good speed for a 12 year old, but by no means is it unusual. The splitter puts a lot of stress on the elbow, according to people I trust. The changeup I think is a great second pitch for a 12 year old, but is pretty hard to learn. If a 12 yo can learn it and throw it with a little movement and significant speed difference from his fastball, it is the best second pitch to have, in my opinion.