The 1960s -- The NFL surpasses baseball in popularity

The NFL has 13 teams

Aug 1, 1960

Dallas joins the NFL to increase the number of teams to 13

The American Football League begins

Sep 1, 1960

Now there are two pro football leagues, the NFL and the AFL

Baseball is more popular than football

Dec 1, 1960

Polls show pro baseball is more popular than pro football by 34 to 21 percent.