For the third straight game the Baltimore Ravens will be the underdogs; considering how the first two went, that's probably just fine with them. The Ravens opened as five-point underdogs against the San Francisco 49ers, but the line has since moved to 3.5 points at most sportsbooks.
Baltimore has covered the spread in all three of its playoff games, once as 7.5-point favorites against the Colts and twice winning outright as significant underdogs to both the Broncos and Patriots. Just as the Ravens are comfortable being underdogs, the 49ers have grown comfortable as favorites, winning both their playoff games from that position.
In the regular season, the Ravens struggled against the spread, going just 6-9-1. The Niners fared better, with a 9-7 record. The two teams did not meet this year, but played on Thanksgiving in 2011 with the Ravens coming out on top, 16-6.
The over/under for the game opened at 49, but has since dropped to between 47 and 47.5 points. Statistically the two offenses match up very well. The Ravens finished the season 10th in scoring offense at 24.9 points per game and the Niners finished 11th at 24.8 points per game.