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.
Phoenix, AZ. It might be 100 degrees outside during the Summer in Phoenix, but at Chase Field, you can step inside to watch the Arizona Diamondbacks play ball and even jump in a pool! Opening in 1998, Chase Field was the first stadium ever built to have a retractable roof and a natural grass field. With MLBâs announcement that Phoenix would be awarded an expansion franchise, a new stadium was built. Shaped like a massive airport hanger, construction on the stadium began on November 16, 1995.