A Major League Baseball team has nine players on the field, which player is the most important to defend your decision? A team has not a total of nine players, I would say that all players are important, but the most important position would probably be the pitcher. The pitcher is responsible for throwing pitches and controlling how many hits can be made. They can control whether or not they want a player to walk. They have the overall sight of the field. That's what makes my decision of a pitcher being the most important on the field. Usually they make or break a game depending on how many hits they allow and how many runs they allow to come in.