Bullpens are often associated with baseball, as they are the areas where pitchers warm up before taking the mound. However, there are several antonyms that can be used in place of bullpens. One possible antonym is starting lineups, which refers to the group of players who are scheduled to start the game. Another antonym is reserve players, who are not in the starting lineup but are available to come off the bench. Finally, there is the term inactive players, which refers to players who are not able to play due to injury or other reasons. While bullpens are an integral part of baseball, these antonyms provide an alternative perspective on the game.