American Football

American football evolved from rugby and soccer in the late 19th century; the NFL (National Football League), founded in 1920, is now the most profitable sports league in the world with revenues exceeding $20 billion annually. The Super Bowl is the most-watched TV event in American history, regularly drawing 100+ million viewers. The sport is a complex chess match of strategy, athleticism, and teamwork — 22 players on the field, each with a specific assignment on every play, creating infinite tactical possibilities. The game has produced iconic players — Jim Brown, Johnny Unitas, Joe Montana, Jerry Rice, Tom Brady (who won 7 Super Bowls) — and cultural moments. Growing concerns about CTE (chronic traumatic encephalopathy) from repeated head impacts threaten the sport's long-term viability.