In this episode, we explore the fundamental structure of baseball, focusing on its rules, gameplay mechanics, player positions, and major professional leagues. Listeners learn about how the game is played over nine innings, the methods of scoring runs and recording outs, and the crucial roles of each defensive player. The episode also covers how professional baseball is organized, highlighting Major League Baseball (MLB) in the U.S., along with prominent leagues in Japan, Korea, and Latin America. Finally, we reflect on the game's strategic nature and international appeal.