“Stay on top of the ball”
I don’t agree with this teach for a number of reasons, I don’t think I’m alone. Younger players will often allow their fingers to throw from inside or outside of the ball. I think they should stay to the inside to get the ball to tail consistently.
My son’s fastball will sometimes cut (away from RH hitter) and sometimes tail (into a RH hitter) and sometimes be straight. He doesn’t currently dictate the movement.
I am working with him on making his fastball always tail. I believe this will afford him better control. I believe this since you know how the ball will move and its spin you can dictate where it will go. i don’t believe a straight fastball is a good FB
Curious what others in the know have to say on this topic. So much is written about making the other pitches move consistently and how little fastball movement is emphasized.