American and Canadian football are gridiron codes of football that are very similar; both have their origins partly in rugby football, but some key differences exist between the two codes.
Harvard v McGill football game, played in 1874 under an adaptation of the rugby union rules
The 1944 "Tea Bowl" at White City Stadium in London: first half played under U.S. rules, second under Canadian rules. The Canadian Army "Mustangs" beat the US Army Central Base Section "Pirates" 16–6, but lost the "Coffee Bowl" rematch 18–0.
These are the player positions for both offensive and defensive. Note that eleven players per side are used, as opposed to twelve.
Image: Football Spiel Berlin Kobra Ladies gegen Berlin Knights Ladies in Berlin, 2019 06 01 0067
National Football League
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The National Football League (NFL) is a professional American football league that consists of 32 teams, divided equally between the American Football Conference (AFC) and the National Football Conference (NFC). The NFL is one of the major professional sports leagues in the United States and Canada and the highest professional level of American football in the world. Each NFL season begins annually with a three-week preseason in August, followed by the 18-week regular season which runs from early September to early January, with each team playing 17 games and having one bye week. Following the conclusion of the regular season, seven teams from each conference advance to the playoffs, a single-elimination tournament that culminates in the Super Bowl, which is contested in February and is played between the winners of the AFC and NFC championship games.
The Akron Pros won the first APFA (NFL) Championship in 1920.
Roger Goodell, National Football League Commissioner since 2006 (pictured in 2012)
Chicago Bears quarterback Caleb Williams, the first overall pick of the 2024 NFL draft