The only big difference between the National League and the American League (AL) was that the AL used the "Designated Hitter" (or DH). The Designated Hitter is a player who does not play in the field, but is used to bat for the pitcher. The NL did not use the Designated Hitter, and all players on the team must bat and field for themselves. This was changed following the new CBA signed in 2022.