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It wasn't invented it was founded silly... but it originated from the a.f.l. The american football league. in 1920 first team was the San Francisco 49 .they played college teams in playoffs,only them.and their whole team was Negroes so it made them special to the a.f.l and soon after more teams came to the a.f.l, too many to for one league. So they put some teams into the n.f.l.and some in the a.f.l and now american football league is now arena football league. enjoy the knowledge!!

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11y ago
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13y ago

The National Football League was founded in 1920 under the name American Professional Football Association. The name was changed to National Football League in 1922.

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11y ago

It was started in 1920, in Canton Ohio. That's why that's where NFL the hall of fame is located.

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12y ago

The merger was approved in 1966 and went into effect during the 1970 season.

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Q: When did the national football league exist?
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