In which scenario would a runner remain at their original base despite a catch?

A runner remains at their original base despite a catch in the scenario where they do not tag up after a catch. In softball, when a fly ball is caught before it hits the ground, any runners on base must "tag up" by touching their original base after the catch before they can advance to the next base. If they fail to do this, they are not allowed to legally advance and must remain at their original base.

In contrast, if the ball is caught on the ground or if the batter doesn’t swing, those scenarios do not directly relate to the requirement for the runner to tag up. Additionally, uncertainty about the game rules, while it may affect a runner's decision-making, does not establish a rule that allows them to remain at their base. Therefore, it is critical to understand that the act of tagging up is fundamental to advancing bases following a catch, and failing to do so means the runner must hold their position.