|Career highlights and awards|
John "Jack" Gass was an early professional football player. He played mostly with the Latrobe Athletic Association from 1895 until 1899. In 1898 he was a member of the Western Pennsylvania All-Stars, which was a team put together by Latrobe manager Dave Berry for the purpose of challenging the star-filled Duquesne Country and Athletic Club to the first pro football all-star game held at Exposition Park in Pittsburgh. The All-Stars lost to Duquesne, 16-0. In 1897, Gass was a member of the very first all-professional football team, in Latrobe, to play a complete season together. In 1900, he played for Latrobe's rival, the Greensburg Athletic Association.
- Van Atta, Robert (1983). "The History of Pro Football At Greensburg, Pennsylvania (1894-1900)" (PDF). Coffin Corner. Professional Football Researchers Association (Annual): 1–14. Archived from the original (PDF) on 2010-11-27.
- Riffenburgh, Beau & Bob Carroll (1989). "The Birth of Pro Football" (PDF). Coffin Corner. Professional Football Researchers Association. 11 (Annual): 1–30. Archived from the original (PDF) on 2010-11-27.
- Van Atta, Robert (1980). "Latrobe, PA: Cradle of Pro Football" (PDF). Coffin Corner. Professional Football Researchers Association. 2 (Annual): 1–21. Archived from the original (PDF) on 2009-03-26.