When the Westgate Las Vegas SuperBook released the early lines for the NFL opening weekend in mid April, it had the Cowboys as 5.5-point favorites against the Giants on September 11 in Dallas. The line had since shifted downwards somewhat, but still had the Cowboys as 4-point favorites in the season opener.
Obviously, that was before Tony Romo's injury, and Dak Prescott's subsequent promotion to starting Cowboys' QB for the forseeable future.
And while Prescott has played about as well as a QB could have played in the preseason so far - Prescott has a preseason passer rating of 137.8 with a 77.8% completion percentage and leads all QBs in TDs and yards - Vegas doesn't like Prescott as much as it did Romo:
In an early reaction to news of Romo's injury, the Westgate SuperBook now has the season opener against the Giants as a pick 'em with even odds, while Sportbook.ag has even installed the Giants as -1.5 favorites. We'll see over the course of the week where the line ultimately settles.
Scott Cooley of Bookmaker.eu explains the impact of Romo's injury at the sportsbook.
If Tony Romo is sidelined for Week 1 of the regular season, the Dallas Cowboys will be 2- to 3-point underdogs at home versus the New York Giants. Prior to Week 3 of the preseason, they were 3.5-point favorites at BookMaker.eu.
Romo's value to a spread is 5-6 points. His value has not changed based on Dak Prescott's preseason performance. While Prescott has performed well, he's done well against basic defensive play-calling and often defensive reserves.
Prior to Romo's injury, the Cowboys had 22/1 odds to win the Super Bowl at BookMaker Sportsbook. Should he miss an extended period of time, their Super Bowl odds could climb as high as 30/1. All odds involving the Dallas Cowboys have been pulled from our wagering board until we gather more information.
In any case, how the Cowboys play the season opener, favored or not, will tell us a lot about what to expect from the coming Romo-less but Prescott-enhanced games.