This bit of knowledge gives me hope for my son who is throwing 79-82, but I believe it is being read close to the plate, not out of his hand. He was clocked at 84-85 a year ago at a PG event (not the underclass when he was hurt) and he has improved since then.
If I add 3-5 MPH for his out of the hand velocity, it all begins to make more sense. Catchers say he is throwing hard and he looks like he is throwing hard, but I have been relying on the radar gun.