If your catcher has a "catchers arm", he can make that throw at 15. Dr Stockton's tape can show how to do it as well.
Just like the SS who makes a back hand stop in the hole and throws with his core because his weight is back, a catcher and make the load and throw.
When the catcher receives a ball on the outer half, he just takes his weight or momentum over his right leg and his left leg lines up with 2b and he lets it go. Its been proven to work.