Winners never quit, and quitters never win—and Carrie Underwood is no quitter.

Carrie Underwood is the voice of the Sunday Night Anthem welcoming fans into Sunday Night Football, but how long has she been opening SNF?

As revealed Tuesday (Aug. 4), the country star will once again perform "Waiting All Day for Sunday Night" for the weekly musical number that plays before each of the live pre-game broadcasts, this tim...