Which of the following scenarios is considered legal when pitching?

In the context of pitching legality, the scenario where the pitcher moves their glove in front of their chest and stops before pitching is considered legal because it is a common action that does not violate any specific pitching regulations. This action is part of the natural pitching motion, allowing the pitcher to prepare for the delivery of the ball. Maintaining a pause in the glove position can help create a rhythm in the delivery process and does not constitute a distinct illegal motion, provided the pitcher then proceeds to deliver the pitch without any additional illegal motions.

The other scenarios either describe actions that could lead to a violation of pitching rules or do not represent a legal pitching sequence. Understanding the nuances of the rules ensures pitchers maintain proper form and legality, contributing to fair play and game integrity.