The 10 biggest what-ifs in Dallas Cowboys history

6. What if Tony Romo didn't bobble the snap?

Bill Parcells never found a way to turn the Cowboys into consistent winners during his four years — but he did find them their next franchise quarterback.

When he first arrived in Dallas in 2003, he and offensive coordinator Sean Payton brought in Tony Romo, an undrafted free agent from Eastern Illinois. Romo spent the first three seasons of his career on the bench but then finally got his shot in 2006.

In a Week 6 blowout win over the Houston Texans, Romo came in and completed two passes for 35 yards and a touchdown. He then took over for Drew Bledsoe in the second half of their following game which was against the New York Giants.

Romo threw a pick on his very first pass attempt but still managed 227 yards. It was enough for Parcells to make the change permanent and he led them to a 6-4 finish and a 9-7 overall record.

He then made the start in their lone playoff game which went down in infamy.

Trailing the Seattle Seahawks 21-20 with 1:19 to go, Romo and the Cowboys had to settle for a field goal from the Seattle eight. Despite being the starter, Romo was still the holder on field goals so he stayed in the game. He then bobbled the snap and was tackled for no gain as he attempted to run for the first down.

The Seahawks held on to win and Parcells retired following the game.

But if Dallas did execute the play, what would have happened?

Well, the Cowboys would have gone on to face the Chicago Bears. And if they beat them, it would have been a showdown of Parcells vs. Sean Payton as he led the Saints to the NFC Championship against the Saints.

Perhaps they win there as well but can't handle the Colts in the Super Bowl. No one will ever know but the possibilities are limitless if Romo doesn't bobble that snap.