I don't follow American Football - hard to beat Gaelic Football!!
I don't follow American football either, but apparently our local team is in a big game, because the church was full of people in team shirts this morning, and the neighborhood is full of parties this evening.
Seems to me you should have heard of European Football...that's American football played in Europe (Spain and Germany have teams, just to name two) with some American players, but by American rules. There is also "arena football" which is just that: football played in an arena. You really should get out more, Irish! ;o]