In 1990, the league expanded its playoff system from a 10-team to a 12-team tournament. With these changes, three wild card teams (those non-division champions with the conference's best won-lost-tied percentages) qualified, up from two the year before.
There was no traditional Wild Card playoff round in 1982. A players' strike reduced the regular season to nine games. Thus, the league used a special 16-team playoff format (dubbed the "Super Bowl Tournament"), just for this year. Division standings were ignored. Eight teams from each conference were seeded 1-8 based on their regular season records. Because of the eight-game first round, this was the first (and currently only) time that NFL playoff games were regionally televised across the United States instead of nationwide. This year was also the only season in which the conference championship games were played on separate days.
1978 marked the first year that the playoffs expanded to a ten-team format, adding a second wild card team (a fifth seed) from each conference. The two wild card teams from each conference (the 4 and 5 seeds) would play each other in the first round, called the "Wild Card Playoffs." The division winners (seeds 1, 2, and 3) automatically advanced to the Divisional Playoffs, which became the second round of the playoffs.