The Seahawks opened as 2.5-point favorites at multiple Las Vegas sportsbooks, but the number was down to a pick 'em at the Westgate Superbook and the William Hill and Wynn sportsbooks within an hour after opening. CG Technology was holding at Seattle minus-1. The MGM had the Patriots as 1-point favorites.
There will be two weeks' worth of bets to shape what will be a highly anticipated Super Bowl on Feb. 1, in Glendale, Arizona. The Super Bowl point spread has never kicked off at a pick 'em.
This will be the sixth Super Bowl appearance for the Patriots under coach Bill Belichick and quarterback Tom Brady.
The MGM took a six-figure wager on New England minus-1 on Sunday night, according to vice president of race and sports Jay Rood.
Championship Sunday opened with a wild finish between the Seahawks and Packers. The money line odds at William Hill's live betting changed 291 times during the game. Trailing 19-7 with five minutes to play, Seattle was a 30-1 underdog to comeback to win the game after Seahawks quarterback Russell Wilson threw his fourth interception with 5:13 to play.
William Hill took three bets on the Seahawks at 30-1, the largest a $200 wager that paid $6,000, book spokesman Michael Grodsky told ESPN.
Seattle's miraculous comeback was a killer for the MGM sportsbook. In the final hour before kickoff, the MGM took a six-figure bet on the Packers plus-8.5; a six-figure bet on over 44.5; a six-figure bet on the Seattle money line, and a six-figure teaser bet on Green Bay and the over. They all cashed.
"Very brutal," Rood said.
The Super Bowl over/under total opened at 48.5 at most shops and was sitting at 49 as of Sunday evening.