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.
The Oakland Raiders of the American Football League moved to Frank Youell Field, a makeshift stadium near downtown Oakland, in 1962, and the Coliseum was already being heralded in the local media as the Raiders' future permanent home. Baseball was also a major factor in the planning of the Coliseum.