Do you need to use arm pronation to throw cut fastball? I don’t want to risk elbow or shoulder damage. Right now I obviously throw my cutter with no arm pronation and it moves like a sinker.
Everytime you throw you use pronation of your arm
True - everyone pronates on every pitch… after ball release. But certain pitches require pronation at and just before ball release. So, to say only that everyone pronates isn’t telling the complete story and just causes confusion. And I think Johnny is confused.
You use supination - not pronation - to throw a cut fastball (even though you will pronate after ball release). If you are throwing a cutter and it moves like a sinker (i.e. it tails to the throwing arm side), then you are pronating and you are throwing a sinker - not a cutter.