The Dallas Tornado qualified for the playoffs by virtue of having the highest non-division-winning point total in the league (119 points). They defeated the defending league champion Rochester Lancers 2–1 in a marathon best-of-three semifinal series. The series featured two of the longest matches in the sport's history due to the NASL's adoption of a sudden death rule to replace the penalty shootout. The first leg ended shortly before midnight on September 1 with a victory for Rochester after 176 minutes and required six overtime periods; the third leg lasted 148 minutes with four overtime periods and sent the Tornado to the final with a 2–1 win.[4][5]
The Atlanta Chiefs qualified for the playoffs by winning the Southern Division with 120 points. The Chiefs then defeated the New York Cosmos in the semifinals with two wins and no goals conceded.