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.
1 The name was changed to Chase Field on September 23, 2005 after Bank One Corporation merged with JPMorgan Chase. 2  Owned by the Maricopa County Stadium District. 3  Is approximately 1,100 feet above sea level, second only to Coors Field (5,277 feet) in the Major Leagues. 4  Has a total of 75 luxury suites.