When may a courtesy runner be replaced by another courtesy runner?

The option stating that a courtesy runner may be replaced by another courtesy runner before the next pitch at any time is correct. This flexibility allows coaches and teams to manage their players more effectively during the game. A courtesy runner is typically used for a player who can’t run the bases effectively due to injury or lack of speed, and giving the coach the ability to replace the courtesy runner before the next pitch accommodates various game situations.

Other scenarios, such as waiting for an injury to replace the runner, or constraints tied to certain counts like a strikeout or four balls, would unnecessarily limit the strategic options available to teams. Allowing a replacement at any time before the next pitch supports dynamic player management without being overly restrictive, thereby promoting fair play and effective game management.