My career spanned the era when relievers started to become more important
When I first came up, the bullpen was pretty much where they put the guys who couldn't start.
Then you figure out that if you don't throw it as hard as you can, you can put it where you want. It's more important where you put it
I was in good control of my body, and I kept my head still.
But through experience I learned to control my body and locate the ball.
It took me a few years to realize that throwing harder wasn't always better.