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?
They merged to boost the popularity of the sport in the United States.
Okay. That makes sense. Did the 2 leagues compete or were they totally separate?
Mile High from 2001–2010 and Sports Authority Field at Mile High from 2011–2017). Prior to that, they played at Mile High Stadium from 1960 to 2000.
The Broncos were barely competitive during their 10-year run in the AFL and their first seven years in the NFL. They did not complete a winning season until 1973. In 1977, four years later, they qualified for the playoffs for the first time in franchise history and advanced to Super Bowl XII. Since 1975, the Broncos have become one of the NFL's
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