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.
(credit: CBS) Coors Field stands on 76 acres of land at 20th and Blake in downtown Denver. The venue opened in 1995 after the Colorado Rockies played their first two seasons at Mile High Stadium. The first game played for fans at Coors was April 26, 1995, when the Rockies beat the New York Mets 11 to 9.