Speaking to the lower levels here (AAA, AA, A etc..).
All too often, coaches over coach. We tell them something every swing at batting practice. Every play in the field. Every throw. All the time we are giving them tips, instruction, reminders.. Too much. We need to shut up. Let them play. Encourage them every play. Then the next inning, maybe a tip.
If you correct your players every play, they will be reliving that play the next play. Thinking about that last play instead of the next one.
Get your kid’s head in the next play, not the last one.