What is required of a coach when a substitution occurs during defense?

When a substitution occurs during defense, it is essential for the coach to report the substitution to the umpire before the next batter comes to the plate. This requirement ensures that all players, officials, and spectators are aware of the changes in personnel on the field. Reporting the substitution promptly maintains the flow of the game and upholds the integrity of the rules governing player participation.

This process prevents any confusion regarding which players are actively participating in the game, especially since a substitution can impact defensive strategies and match-up opportunities. By informing the umpire before the next batter, the coach also helps ensure that the game runs smoothly and adheres to the established protocols.

Other options do not align with the established rules. For instance, failing to inform the umpire about a substitution could lead to potential disputes about player eligibility or roles during the game. Delaying the report until after each inning or only informing players on the field does not fulfill the regulatory requirement for transparency in player changes.