49ers quarterback Alex Smith (11) watches as quarterback Colin Kaepernick (7) takes a snap during practice, Jan. 30, 2013, in New Orleans. The 49ers are scheduled to play the Baltimore Ravens in the NFL Super Bowl XLVII football game on Feb. 3. (AP Photo/Mark Humphrey)

49ers running back Frank Gore (21) runs a play during practice, Jan. 30, 2013, in New Orleans. (AP Photo/Mark Humphrey)

Ravens wide receiver Torrey Smith prepares to catch a pass as he warms up during an NFL Super Bowl XLVII football practice, Jan. 30, 2013, in New Orleans. (AP Photo/Patrick Semansky)

Ravens wide receiver Jacoby Jones prepares to catch a pass as he warms up, Jan. 30, 2013, in New Orleans. (AP Photo/Patrick Semansky)

49ers defensive tackle Justin Smith (94) and teammates warm up during practice at the New Orleans Saints facility, Jan. 30, 2013, in New Orleans. On the wall behind them is a poster of Saints head coach Sean Payton. (AP Photo/Mark Humphrey)

49ers head coach Jim Harbaugh, center, watches as quarterback Colin Kaepernick, left, and tight end Vernon Davis (85) run a play during practice, Jan. 30, 2013, in New Orleans. (AP Photo/Mark Humphrey)

Ravens quarterback Joe Flacco warms up during an Super Bowl XLVII practice, Jan. 30, 2013, in New Orleans. (AP Photo/Patrick Semansky)

Ravens running back Ray Rice, left, catches a pass as linebacker Ray Lewis walks past during practice, Jan. 30, 2013, in New Orleans. (AP Photo/Patrick Semansky)

49ers quarterback Alex Smith (11) passes during practice, Jan. 30, 2013, in New Orleans. (AP Photo/Mark Humphrey)