RPM is the acronym used for revolutions per minute. It measures the number of revolutions completed in one minute around a fixed axis, giving the speed of a mechanical component. It is commonly used to describe the performance of automobile engines.
Like most ballparks built from the 1990s onward, Safeco Field is a 'retro-modern' style ballpark that incorporates many of the features of ballparks built in the 1950s and earlier with modern amenities.
It may be the fourth oldest ballpark in the American League, but the home of the Kansas City Royals has remained one of the most picturquest ballparks in baseball. When it opened in 1973 the stadium broke away from the trend of multipurpose stadiums built during this time. Major League Baseball arrived in Kansas City in 1955 when the Philadelphia Athletics moved to the city and into Kansas City Municipal Stadium. Originally built in 1923, it was rebuilt and expanded for the Aâs.