<p>    This study aimed to provide insights that will help to improve the coaching skills of baseball coaches by revealing the practical coaching knowledge that is exhibited by an outstanding coach and examples of the coaching he has provided to excellent players. In this study, an interview was conducted on a baseball coach who instructed two active Major League players during their high school years, and the responses given were then analyzed and interpreted qualitatively. As a result, the following findings were obtained. <BR>1) The outstanding coach acquired practical knowledge of coaching in search of an edge and realized conflicting coaching practices in a single method. <BR>2) The outstanding coach planned and practiced a method of encouraging his player to become aware of the challenges faced by the player by setting up games with appropriate opponents and encouraging the player to work independently, based on a prediction of the outcome, and the outstanding coach himself had a sense of urgency for his players' growth. <BR>3) Even in cases where an elite player achieved his mid-term goal suggested by the outstanding coach, the outstanding coach conducted critical reflection, reviewed goal setting, and developed a model that emphasized the achievement of long-term goals, including personality development for the realization of the Athlete First. <BR>4) The outstanding coach was aware that the experience of winning led to rigid coaching, and he recognized the importance of providing flexible coaching to the players in front of him without emphasizing too much on experience.</p>