What position did Roger Staubach primarily play?

What jersey number did Jim Kelly wear with the Bills? What position did Warren Moon primarily play? Which college was Warren Moon playing for when he entered the NFL? What jersey number did Warren Moon wear with the Oilers? Roger Staubach is best known for playing with which NFL team? Which college was Roger Staubach playing for when he entered the NFL? What jersey number did Roger Staubach wear with the Cowboys? What position did Joe Namath primarily play?