The NFL's longest game ever, a Divisional playoff matchup between the Dolphins and Chiefs at Kansas City's Municipal Stadium, was played on Christmas in 1971 and lasted over 80 minutes. The Hank Stram-coached Chiefs, two years removed from a Super Bowl, were facing a Miami team whose coach was the great Don Shula.
In 1971, the NFL made history by holding its first Christmas Day games, featuring the Cowboys vs. Vikings and the Chiefs vs. Dolphins. The latter, a double-overtime thriller, remains the longest game in NFL history.