Allegheny Athletic Association & the Pittsburgh Athletic Club Rivalry
https://en.wikipedia.org/wiki/Pittsburgh#1900_to_present Excerpt from the article: From 1891 to 1911, the city's name was federally recognized as "Pittsburg", though use of the final h was retained during this period by the city government and other local organizations. [24] [20] --------------------------------------------------------------------------- http://pabook2.libraries.psu.edu/palitmap/Football.html Excerpts from the article: Where was professional football born? When did the first professional game take place? On November 12, 1892 Pittsburgh[*], Pennsylvania held the very first professional football game between the Pittsburgh Athletic Club and the Allegheny Athletic Club. * Allegheny, PA was the actual site. Allegheny City was a municipality that existed in the U.S. state of Pennsylvania from 1788 until it was annexed by Pittsburgh in 1907. [Source: https://en.wikipedia.org/wiki/Allegheny,_Pennsy...