When is the role of the designated hitter (DH) terminated for the remainder of the game?

The role of the designated hitter (DH) is terminated for the remainder of the game when the DH takes a defensive position. In baseball, the designated hitter is a player who bats in place of a pitcher but does not play a defensive position. If the DH enters the field to play defense, their role as DH is effectively ended, and they can no longer bat in that capacity for the remainder of the game. This is a fundamental rule to maintain the integrity of the DH position, keeping it strictly for offensive purposes without crossing into defensive play.