Baltimore Ravens quarterback Joe Flacco (5) warms up at an NFL Super Bowl XLVII practice on Friday, Feb. 1, 2013, in Metairie, La. The Ravens face the San Francisco 49ers in Super Bowl XLVII on Sunday, Feb. 3. (AP Photo/Patrick Semansky)
Baltimore Ravens quarterback Joe Flacco (5) warms up at an NFL Super Bowl XLVII practice on Friday, Feb. 1, 2013, in Metairie, La. The Ravens face the San Francisco 49ers in Super Bowl XLVII on Sunday, Feb. 3. (AP Photo/Patrick Semansky)