Baseball referees, commonly referred to as umpires, are responsible for officiating the game of baseball. They make sure that the rules of the game are followed and that the players are playing fairly. Umpires also make calls on plays such as balls and strikes, fair and foul balls, and safe and out calls. They also have the authority to eject players from the game if necessary. Umpires are an important part of the game and help ensure that the game is played fairly and safely.