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.
In 1923, a new franchise called the Indians was formed and became a member of the Class D Texas Association. In 1925, Waco rejoined the Texas League with the formation of the Waco Cubs. On June 20, 1930, the first night game in Texas League history was played at Katy Park in Waco. The lights were donated by Waco resident Charles Redding Turner, who owned a local farm team for recruits to the Chicago Cubs.