While doing research for another article, I came across a strange record in the North Carolina football media guide. The record for the lowest combined passing yardage in a game in involving UNC is -13, which the Heels (-7) and Penn (-6) in a game in 1943.
Now, yes, 1943 is closer to the advent of the forward pass. It wasn’t used anything remotely close to the frequency it is in the modern era. According to the Daily Tar Heel article about that game, it was also snowing that day in Philadelphia.