Since the 1970 merger of the AFL and NFL, there have been two attempts to form another league . Each lasted little more than a year. The first was the World Football League in 1974.
These were the teams:
Houston Texans…later the Shreveport Steamer
Memphis Southmen. Larry Csonka, Paul Warfield, and Jim Kick went to this team. All three were from the Miami Dolphins and they really made money from this short lived league.
New York Stars…later the Charlotte Hornets
Southern California Sun
The league rules had one good setup. Twenty games with no exhibitions.