In what Super Bowl game did John Jett win a Super Bowl ring at the Sun Devil Stadium? 
John Jett:  Jett won two Super Bowl rings with the Cowboys in Super Bowl XXVIII and Super Bowl XXX. Super Bowl XXX:  The game was played on January 28, 1996, at Sun Devil Stadium in Tempe, Arizona, the first time the Super Bowl was played in the Phoenix metropolitan area.
Super Bowl XXX