Help your players replace expectations with simple tasks they can accomplish most often. These smaller goals, called mini-goals or process goals, such as to have a plan at the plate or watch the release point of the ball and recognize the type of pitch quickly, help athletes focus on execution instead of results.
Not only will your players will feel more confident and successful when they meet these goals, but it will also help them stay focused on the present task rather than end results. Process goals during games should focus on strategy, the mental game, and simple performance cues (i.e. see the ball) that help athletes execute a task without causing them to over-think or over-coach themselves when competing.
Check out the Mental Game Coaching Professional course for more information on coaching the mental game.