What action is taken when B2 takes a practice swing that contacts the catcher's glove while the pitcher has not started his motion to pitch?

When a player takes a practice swing and makes contact with the catcher's glove while the pitcher has not yet begun their motion, the umpire's primary role is to ensure play is conducted fairly and safely. In this scenario, declaring time for all players to reset is the appropriate action because the practice swing introduces an unexpected disruption to the game.

By calling time, the umpire allows for the game to restart without penalizing either team for the incidental contact, maintaining the flow of play and ensuring that both the pitcher and catcher can return to their ready positions. This approach acknowledges that the pitcher has not initiated their pitch yet and there is no ongoing play, therefore enabling a fair and safe continuation of the game.

The other possible actions do not adequately address the situation or the need for safety and order, illustrating why resetting the game is the most appropriate response.