If B1 hits a pop-up that could have been caught but was not, how is this recorded?

When a batter hits a pop-up that could have been caught but was not, it is typically recorded as an error for the defensive team. This is because the defensive player had an opportunity to make the play and failed to execute, resulting in the batter reaching base safely. In this context, recording it as a team error reflects the principle that a defensive team's failure to make a play when they had a reasonable chance to do so is not credited to the batter as a hit. Instead, the lack of execution by the fielder is the reason for the error.

A hit would imply that the batter reached base due to a well-executed hit, which was not the case here. A sacrifice involves intentionally giving up an out to move a base runner, which does not apply in this scenario either. Lastly, marking it as an out would misrepresent the situation, as the batter successfully reached base due to the fielder’s error. Thus, recognizing the situation as a team error accurately reflects the details of the play.