The Rebels joined the league in 1976 as an expansion team.
The rivalry started in 1960 when the Cowboys joined the league as an expansion team.
The Storm joined the league in 1997 as an expansion team.
The Pilots joined the league in 1996 as an expansion team.
The Cougars joined the league in 1998 as an expansion team.
The Rockies joined the league in 1978 as an expansion team.
The Heat joined the league in 2011 as an expansion team.
The Generals joined the league in 1990 as an expansion team.
The Rockets joined the league in 1991 as an expansion team.
Carolina joined the league as an expansion team in 1995.
