Roger Staubach played 125 games at quarterback for the Cowboys during the 1970s and led them to two Super Bowl victories.
Tony Romo
Tony Romo.
Roger Staubach, QB
Tony Romo
Troy Aikman for the Cowboys & Neil O'Donnell for the Steelers.
Eddie LeBaron was the original starting quarterback for the Dallas Cowboys from 1960 to 1962. He eventually was supplanted by Don Meredith and retired after the 1963 season.
Tony Romo took over from Drew Bledsoe as starting QB in the 2006 season.
Larry Brown, CB, Dallas Troy Aikman, QB, Dallas Roger Staubach, QB, Dallas Chuck Howley, LB, Dallas per: http://www.nfl.com/superbowl/history
Super Bowl XII - Dallas v. Denver - The starting QB for Denver, Craig Morton, was the starting QB for Dallas in Super Bowl V. The starting QB for Dallas, Roger Staubach, was the backup QB for Dallas in Super Bowl V.
Tony Romo
Troy Aikman, who had a 94-71 record with the Cowboys from 1989-2000.
Jason Campbell started the 2007 season as the starting quarterback.