The designated hitter rule has been controversial for over 40 years since its introduction in the American League in 1973. Supporters argue it increases offense and protects pitchers, while critics say it removes strategy from the game. The debate pits the American League, which uses the DH, against the National League, which does not. While some see the DH as damaging baseball's integrity, others view it as a necessary adaptation that has become ingrained in the modern game. The controversy continues with no resolution in sight.