The Denver Broncos are my favorite American football team.
I do not know much about them. I don't really pay attention to football.
Well they first played in the AFL in 1960 and then they joined the NFL in 1970, when they merged.
Why did they merge?
AFL–NFL merger
The AFL–NFL merger was the merger of the two major professional American football leagues in the United States at the time: the National Football League (NFL) and the American Football League (AFL). It paved the way for the combined league, which retained the "National Football League" name and logo, to become one of the most popular sports leagues in the United States. The merger was announced on the evening of June 8, 1966. Under the merger agreement, the leagues
season by bringing in a football team.
Howsam first sought an expansion NFL team for Denver. When that bid was turned down, the Howsams founded the Denver Broncos—one of the eight charter members of the American Football League. (The Howsams and the seven other original owners called themselves the "Foolish Club" for daring to take on the established NFL.)
The Broncos played in the AFL from 1960 to 1969 and then joined the NFL with completion of the NFL/AFL merger in 1970. After a