What is wbc mercy rule?

The WBC Mercy Rule is a rule in the World Baseball Classic (WBC) tournament that allows a game to be ended early if one team has a large enough lead over the other. The rule applies after the completion of 5 innings (or 4.5 innings if the home team is leading) and if a team is leading by 10 or more runs. The game is then declared over, and the leading team is declared the winner. This rule is designed to prevent a team from running up the score against its opponent and to also prevent further wear and tear on the players.