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The National Football League (NFL) is a professional American football league consisting of 32 teams, divided equally between the National Football Conference (NFC) and the American Football Conference (AFC).
In American football, there can only be 11 players from each team on the field at one time. There are usually about 45 players that are cycled through each game, and a team can have no more than 53 players total. Teams may have up to 53 players on roster, of which 45 may play in each game.