Super Bowl spread 2013: 49ers open as 5-point favorite

The Baltimore Ravens have already pulled two upsets on their way to the Super Bowl, but if they are going to win Super Bowl XLVII, they will have to pull of one more upset. San Francisco opened as a 5-point favorite, according to Odds Shark.

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Despite the 5-point spread, the Ravens are actually less of an underdog than they were in the last two rounds. After being a 7.5-point favorite in their opening round game against Indianapolis, Baltimore was a heavy underdog against Denver and New England. The Broncos opened as a 9-point favorite against the Ravens while New England opened as an 8-point favorite.

While Baltimore is in a familiar role as an underdog, San Francisco is no stranger to being the favorite. The 49ers were 3-point favorites against Green Bay in the Divisional round and a 3-1/2-point favorite against Atlanta in the NFC Championship game. That, despite the fact the 49ers were playing on the road.

Both teams are known for defense, but oddsmakers aren't predicting a low scoring game as the total opened at 49 points.