If a runner leaves the base before the pitch reaches the batter, what is the consequence?

When a runner leaves the base before the pitch reaches the batter, the appropriate consequence is that the runner is called out on appeal. In baseball, the rules stipulate that a runner must remain in contact with the base until the pitch is delivered by the pitcher. If the defensive team notices the infraction and makes a proper appeal, they can request that the umpire call the runner out for leaving the base too early.

This rule is in place to maintain the integrity of the game and ensure that all players follow the established guidelines for base running. The appeal mechanism is a fundamental part of the game, allowing teams to enforce rules when they believe an infraction has occurred.

The other options do not accurately reflect the rules regarding this situation: the play does not continue as normal when a runner leaves early, the runner cannot simply remain on base without consequence, and there is indeed a consequence for the runner leaving the base prematurely. Thus, the correct consequence underscores the importance of adhering to the rules governing base running in baseball.