NFL stands for National Football League. NFL has 32 teams that give it their all to become champions. NFL was founded in the year of 1920 which was a long time ago. Green Bay Packers have won 13 title which is most by any team. “I don’t make excuses, I make results. NFL is a league in which players play American Football and it is the most popular sport in the United States.” See below for some NFL wallpapers.