Who can discover an illegal player in a baseball game?

An illegal player in a baseball game can be discovered by both an umpire and either team. This is important because it ensures that all participants, including players and officials, are vigilant about compliance with the rules.

An umpire has the authority to observe and enforce the regulations during the game, which includes identifying if a player is ineligible to participate. If the umpire discovers an illegal player, they have the responsibility to enforce the rules appropriately, potentially leading to the ejection of that player and addressing any implications for the team.

On the other hand, any member of the opposing team can also raise a concern regarding a player's eligibility. This aspect adds an element of accountability; players must ensure their team is in compliance with the rules at all times. If an opposing team identifies a player who does not meet eligibility requirements—such as being unregistered or having violated prior regulations—they can bring this to the attention of the umpire.

This collaborative approach helps maintain the integrity of the game, as it empowers both the officials and the teams to uphold the rules.