The Dallas Cowboys. The term originated in a highlight film in 1978 about the football team. Many other teams have tried to steal the nickname but failed because apparently they're unable to come up with anything original themselves. It's like trying to call Saint Paul, Minnesota Hockeytown - it's just not right; Detroit coined the term, thus it's theirs.
They appear on television so often that their faces are as familiar to the public as presidents and movie stars. They are the Dallas Cowboys, "America's Team."
-Bob Ryan, 1978
I love that on Thanksgiving day I can turn the TV on and always see America's Team playing.
It's been a while since America's Team won a Superbowl, hopefully Romo won't choke again this year.