The Philadelphia Eagles are the biggest Super Bowl underdogs in nine years.

The Westgate SuperBook installed the Eagles as 5.5-point underdogs to the New England Patriots for Super Bowl LII on Sunday.

The betting favorite has won 33 of the previous 51 Super Bowls.

Philadelphia is the largest Super Bowl underdog since the Arizona Cardinals were seven-point underdogs to the Pittsburgh Steelers in Super Bowl XLIII.