What defines a double-header in baseball?

A double-header in baseball is typically defined as two games played between the same teams on the same day. The specific format of a double-header can vary, but the most common definition seen at the high school level and in many leagues is two seven-inning games. This format allows for more games to be played without excessively prolonging the event, making it manageable for players and fans alike.

This structure helps teams maintain player performance and manage pitching staff effectively over the course of a long season. It also facilitates scheduling, as it allows teams to complete two games in one day while adhering to the limitations of available daylight or venue resources.

In contrast, other options present different game structures that do not align with the standard definitions of a double-header. For instance, playing one nine-inning game followed by a seven-inning game is not a typical double-header format, and defining a single game lasting extra innings does not constitute a double-header at all. Similarly, while two nine-inning games could be considered a double-header, it is less common in high school baseball due to the increased duration, which can lead to fatigue and scheduling difficulties.