When can a player request a timeout during an at-bat?

A player can request a timeout anytime before a pitch is thrown. This rule is in place to allow players to regroup, adjust their stance, or communicate with the coaches without interfering with the game or the pitcher's rhythm. The flexibility to call for a timeout helps players manage their mental state during an at-bat, which can be crucial for performance.

In contrast, the other situations mentioned restrict the timing of a timeout. For example, a player cannot call for a timeout when the pitcher is about to pitch since that would disrupt the flow of the game and could potentially give an unfair advantage. Additionally, the rule does not limit timeout requests to before two strikes or only during an injury to a runner; rather, players have the right to call for a timeout at their discretion up until the moment the pitcher delivers the ball.