Here is one of what must have been numerous different conceptual drawings put together by architects for the O'Malley's. The drawing above, recently shared by MLB Cathedrals on twitter, is dated 1957 and was created by a local father and son duo of Stiles and Robert Clements.
Stiles Clements is famous for his art deco and streamline moderne styles in Los Angeles. He designed the El Capitan Theater Building, the Mayan Theater, Adamson House in Malibu, Samson Uniroyal Tire Factory (present day Citadel Outlets mall), the Wiltern Theatre and Jefferson High School. His son, Robert, had designed more than 110 buildings on Wilshire Boulevard alone.