 The Denver Broncos compete in the National Football League (NFL).
That's very interesting! I've never been much of a Broncos fan.  Can you tell me more about them?
The Denver Broncos  were chartered a member of the American Football League in 1960.
Wow.  I wasn't even alive or thought of in 1960! lol.  Were you?
No, I was not.    Also Not when they joined the NFL as part of the merger in 1970.