What happens when B3's batted ball hits the umpire in front of F4?

In the scenario where B3's batted ball strikes the umpire while in front of F4, the correct outcome is that the ball becomes dead and all runners must return to their respective bases. This is because, under baseball rules, if a batted ball hits an umpire who is in fair territory, the play is ruled dead. Consequently, no advancements are allowed, and all runners must return to the bases they occupied at the time of the pitch.

Understanding this rule is crucial, as it emphasizes the significance of the ball's interaction with the umpire and how it affects the continuation of the play. The ruling helps to maintain order in the game and ensures that no unfair advantage is bestowed upon the offensive or defensive teams as a result of the ball hitting the umpire. This regulation is put in place to promote fairness and consistency in officiating the game.