The game culminates a season that begins in the previous calendar year, and is the conclusion of the NFL playoffs.
[4] A total of 20 franchises, including teams that have relocated to another city or changed their name, have won the Super Bowl.
[5] There are four NFL teams that have never appeared in a Super Bowl: the Cleveland Browns, Detroit Lions, Jacksonville Jaguars, and Houston Texans, though both the Browns (1950, 1954, 1955, 1964) and Lions (1935, 1952, 1953, 1957) had won NFL Championship Games prior to the creation of the Super Bowl in the 1966 season.
The 1972 Dolphins capped off the only perfect season in NFL history with their victory in Super Bowl VII.
The Green Bay Packers, Pittsburgh Steelers, Denver Broncos,[n 1] New England Patriots, and Kansas City Chiefs have each had two separate consecutive appearances.