What must occur if a player with an injury cannot be substituted?

In the scenario where an injured player cannot be substituted, the correct outcome is that the previous batter cannot run for him. This is in line with baseball rules which stipulate that if a player is injured and cannot continue playing, but no eligible substitute is available, the situation may lead to the player needing to be replaced by a suitable runner or remain in the game, provided their injury status allows it.

If the previous batter were allowed to run for the injured player, it could result in a situation where a player who has already completed their plate appearance is now taking an additional role in the game, which is not allowed. In essence, allowing a previous batter to run would create an unfair advantage and does not adhere to the regulations surrounding player substitutions and running responsibilities.

By understanding this rule, umpires can ensure fair play and uphold the integrity of the game, ensuring that all players participate according to established guidelines.