Brief Introduction of NFL
NFL is brief for National Football League. There are totally 32 teams in the League, which are divided into conferences: American Football Convention (AFC) and National Football Convention ( NFC). Every convention has sixteen groups, and these 16 teams are divided into 4 competition areas: East, South, West and North. Thus, every space has 4 teams. The venue is a hundred yards long and 53 yards wide. The slender white line in the enjoying field is called yard line, which…