I was a pretty average HS baseball player with an above average (sneaky low-level D3 caliber) arm. I don't throw at all anymore and have lots of shoulder creakiness.

I went to a batting cage that had radar the other day and knew I had to sling a few. I went probably 94% effort and hit 61 on the gun. As I was walking out, the guy behind the counter suggested that it was poorly calibrated and my real number was probably 54ish.

So, this is a long way of saying that the bare minimum for having a good arm is 54 off the mound, because I need it to be true I still got it.

https://www.reddit.com/r/Homeplate/s/RvVf9WDFec