The first Professional American Football teams in a National League came together from the Ohio League in 1920 to form the American Professional Football Association (APFA) which renamed itself the National Football League (NFL) in 1922. By 1933 it had become a Major League of 10 teams with the next big expansion in 1960 when the American Football League – the latest to use that name after the first in 1926 – started play with 8 teams, most of them in Texas or the Western USA where the NFL had been slow to expand to. By 1970 these two leagues merged to form two Conferences: NFC and AFC, playing the Super Bowl between each Conference Champion. By 1995 there was another big expansion in the South with four more teams added. Now a 32-team league, the NFL has promised to expand globally – NFL teams have frequently moved Stadium, even City, going from one end of the country to another. This is Eirball’s look at NFL teams Era by Era – Incarnation by Incarnation – with a focus on Irish-born players where possible.