The Evolution of American Football Equipment 

In American football, there are several leagues that cater to different levels of play and audiences.

The most well-known and prestigious league is the National Football League (NFL), which is the highest level of professional football in the United States.

The NFL consists of 32 teams divided into two conferences, the National Football Conference (NFC) and the American Football Conference (AFC).

Apart from the NFL, there are other professional leagues such as the Canadian Football League (CFL), which features teams from Canada.

Additionally, there are several indoor football leagues like the Indoor Football League (IFL) and the Champions Indoor Football (CIF), which provide opportunities for players to compete in a more compact, indoor setting.

At the collegiate level, the National Collegiate Athletic Association (NCAA) oversees college football, which is immensely popular, especially in regions like the Southeastern United States.