American Football League
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The American Football League was a major professional American football league that operated for ten seasons from 1960 until 1970, when it merged with the older National Football League, and became the American Football Conference. Wikipedia
No. of teams: 8 (1960–1965), 9 (1966–1967), 10 (1968–1970)
Founders: Lamar Hunt and Bud Adams
Last champion(s): Kansas City Chiefs
Founded: July 1959
First season: 1960
Sport: American football