There are five franchises that have played in multiple Super Bowls without a victory. Atlanta, Carolina and Cincinnati are 0-2. The Vikings and the Buffalo Bills share the scarlet Roman numeral of IV losses.
The Vikings' losses came over the eight seasons from 1969 to 1976. The Bills' losses came consecutively in the seasons from 1990 to 1993.
The first was the most startling for both teams and fan bases. The Vikings took an all-time great defense to New Orleans in January 1970 and lost 23-7 as 12½-point favorites to Kansas City. The Bills took a star-laden, quick-strike offense to Tampa in January 1991 and lost 20-19 as 6½-point favorites to the New York Giants.