Bobby Hebert had a career 12-0 record against AFC Teams by 1991 as a Saint Quarterback

Nice job on the wayback machine 👍

Indeed, those were the days of the NFC’s dozen-or-so years of dominance in the Super Bowl and in general. The Saints won 13 in a row against the AFC from 1987 to 1990, when the Walsh-led Saints dropped games against the Oilers and Steelers. They were 3-1 against the AFC in ‘91, with Walsh once again under center for the one loss to the Chargers.

They were 3-1 vs. the AFC in ‘92 when Bobby played the whole season. The lone loss vs. the AFC with him under center was the ‘92 loss at home to Buffalo. Was a typical loss of that regime, blowing a halftime lead and not having the weapons on offense to put the game away. But it was also during Buffalo’s four-year run going to the Super Bowl. Team full of eventual Hall of Famers.
I was at that game. My fondest memory was Ironhead Heyward trucking some Raiders Db. It's at ,25 in the video
below.