The 1978 NFL season was the 59th regular season of the National Football League. The league expanded the regular season from a 14-game schedule to 16. Furthermore, the playoff format was expanded from 8 teams to 10 teams by adding another wild card from each conference. The wild card teams would play each other with the winner advancing to the playoff round of eight teams. The season ended with Super Bowl XIII when the Pittsburgh Steelers defeated the Dallas Cowboys.