Overview
"Gridiron" and "Pro-Football" are two related pinball machines produced by D. Gottlieb & Co., with "Gridiron" being a reworked version of the earlier "Pro-Football."
"Pro-Football," released in January 1973, is a single-player electro-mechanical (EM) game designed by Ed Krynski, featuring a sports theme with football elements like flippers, pop bumpers, and vari-targets, and it produced 4,500 units.
"Gridiron," released in December 1977, was designed by John Osborne and is essentially the two-player version of "Pro-Football," updated with different artwork and a unique dual scoring system that tracks both standard pinball and football scores on the playfield.
