Which former Cowboys quarterback became a lead analyst for Fox and ESPN broadcasts?

What color flag does an NFL coach throw to challenge a play? What is the "Lambeau Leap"? Which famous NFL broadcaster was known for his "Boom!" and telestrator drawings? Which announcer called the 1980 "Miracle on Ice" and later the NFL on ABC's 'Monday Night Football' and NBC's 'Sunday N… Which former quarterback became CBS's lead NFL analyst in 2017 and is known for predicting plays? Which team did the Dallas Cowboys defeat in Super Bowl XXX? Which team did the Denver Broncos defeat in Super Bowl XXXII? Which team did the Denver Broncos defeat in Super Bowl 50?