If I may ask... what is the relevance of the 17u coach to your 12y.o. son?
Darn it cabbagedad, you caught me!
The 17u coach in question is also my son's 12u coach. That is the conversation we had, and his 17u kid is the primary catcher and also a RHP, so he is drinking his own kool-aid, and it's what he has been doing and plans for my son to do, so I wanted input regarding what others thought.
I have found that I get more informative answers if I leave out the 12u in my post, and in this case I was thinking about ramification further down the line and was this "normal" farther down the time line, so it seemed okay to leave out the 12u.
I will now be expecting the posts that center solely on 12u arms and have very little to do with late HS or college, which have been blessedly absent so far.