What is the ruling if F3 catches a glove with a ball inside it before B1 touches first base?

In this situation, when F3 catches the glove with the ball inside it before B1 touches first base, the correct ruling is that B1 is out. This scenario falls under the rules governing a force play at first base. When a fielder (in this case, F3) has possession of the ball within her glove before the runner (B1) reaches first base, it constitutes a valid tag or force out.

The play continues without interruption as long as the ball is safely in the glove and the catch is made in a legal manner. B1’s status as a runner is determined by her reaching the base; thus, being put out before she can touch first base results in her being declared out. This ruling aligns with the principle that a player is out when tagged by a fielder holding the ball, or in this scenario, when a fielder holds onto the glove with the ball before the runner reaches the base.

Other options do not apply as B1's status is clearly defined by the actions of F3. The play is not ruled dead unless there is an incidental obstruction or another infraction, which is not the case here. Hence, the appropriate call is for B1 to be out.