Timeline (No AFL)

1950s

 * 1959 - Lamar Hunt is becomes the Genral Manager and Head Coach of the Chicago Cardinals, but with his wealth based on Texas oil moves the team to Dallas.

​1960s

 * 1960 - The NFL adds Texas based football team the Houston Cowboys who were originally planned to play in Dallas, but was taken by Lamar Hunt's new Dallas Cardinals, and a rivalry is already built before any games are played between the two teams
 * 1962 - The NFL adds a new Minneapolis based team named the Minnesota Miners
 * 1967 - The NFL adds the New Jersey Giants, Miami Dolphins, San Jose Oakland, and the St. Louis based Missouri Saints

1970s

 * 1970 - The Los Angeles Rams move to Denver becoming the Denver Rams
 * 1971 - The NFL adds the Boston Patriots, Atlanta Rebels, and Seattle based Pacifica Seahawks
 * 1975 - The NFL adds the New Orleans based Louisiana Oilers and Los Angeles Chargers after the Rams move to Denver

1980s

 * 1980 - The NFL adds the Buffalo Bullets and Orlando Predators
 * 1984 - The NFL adds the Indianapolis Nighthawks, Kansas City Chiefs, and the revised Akron Pros as the Cincinnati Pros