What must F1 do if B1 is not in the box ready to pitch within the 20 seconds?

When an offensive player, in this case, B1, is not in the box and ready to pitch within the designated 20 seconds, the responsibilities fall to the defensive player, F1. By waiting until B1 is ready, F1 adheres to the rules governing the pace of play and ensures that the game is conducted in a fair manner. This respect for the game rules fosters a more orderly gameplay experience.

Choosing to wait allows F1 to maintain focus and composure, while also honoring the conditions set by the league regarding readiness. It is essential for players to be on the same page to uphold the spirit of competition and ensure the integrity of the game. On the other hand, actions such as pitching anyway, cautioning B1, or calling for a timeout could lead to confusion, disrupt the flow of the game, or unintentionally conflict with the rules. By waiting, F1 is promoting sportsmanship and adhering to the regulated pace of play.