 Sometimes a home run ball passing over an outfield fence (when hit by a batter) is said to have been hit "out of the ballpark", but that phrase more often refers to a home run ball that cleared the stands, landing outside the building.The playing field is most often called the "ballfield", though the term is often used interchangeably with "ballpark" when referring to a small local or youth league facility.A baseball field can be referred to as a diamond.