By eHow Sports & Fitness Editor
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The National Football League (NFL) is the most popular and competitive sports league in America. One of the main reasons for the level playing field is the salary cap that the NFL institutes for each team. There are ways that teams can manipulate the salary cap to their advantage but as general rule the NFL salary cap is the most equitable in all of professional sports. Read on to learn how to know NFL salary cap rules.
eHow Sports & Fitness Editor