Romo comes with plenty of risk at this stage of his career .
Elway witnessed the reward up - close via a 506 - yard performance in the Broncos ' 51 - 48 instant classic versus the Cowboys three years ago .
Romo comes with plenty of risk at this stage of his career , but Elway witnessed the reward up - close via a 506 - yard performance in the Broncos ' 51 - 48 instant classic versus the Cowboys three years ago .