What happens if R1 advances to third base after ball four is called, even if F2 drops the ball?

When a batter receives ball four, they are entitled to advance to first base. If a baserunner (like R1) is already on a base and then advances to third on this play, the key detail here is that the pitcher's ability to deliver the ball is irrelevant to the advancement of the base runner. The dropping of the ball by F2 (the catcher) does not affect the validity of R1's movement around the bases following ball four.

Since the playing action allows R1 to legally advance to third base without any requirement for the ball to be in play or caught, the advancement is recognized as valid and the game continues. R1 has the right to advance unimpeded in this situation, so the scenario where the game continues supports the interpretation that R1’s advancement to third base is legal despite F2 dropping the ball. This reinforces the rules regarding base runners' rights following ball four, which typically allows for movement regardless of the catching circumstance.

In essence, the understanding of how ball four impacts base runners is crucial in grasping the dynamics of the game, leading to the conclusion that R1's advancement remains valid.