Sportsbooks had what might have been the worst opening day of the NFL season in 20 years.

Favorites went 9-4 against the spread Sunday and delivered a beating that had some shops just hoping to "avoid disaster of epic proportions" heading into the Sunday night game between the Dallas Cowboys and New York Giants.

The underdog Giants covered against the Cowboys in a 27-26 loss, helping the books.

The St. Louis Rams were the most popular pick among the sophisticated players, multiple books said.