What is the ruling if F6 blocks the base after catching the ball in Situation C?

In this scenario, it is determined as a legal play that F6 can legally catch the ball and make a play on the runner. When a fielder catches the ball, they are allowed to occupy a base or area around the base as long as they do not impede the runner without the ball. If F6's positioning does not constitute obstruction — meaning they are not physically blocking B1's pathway to the base while holding the ball — then it is considered a legal play.

The key aspect of this situation involves whether the fielder’s actions interfere with the runner's ability to reach the base. If F6 simply holds their position in a manner that does not obstruct B1’s access to the base, or if B1 has already committed to advancing and F6’s play is in line with the rules, then the play stands as valid. Therefore, the ruling holds that it is a legal play, allowing the game to continue without calling obstruction or dead ball.