Ravens offensive lineman Marshal Yanda speaks at a Super Bowl news conference, Jan. 30, 2013, in New Orleans. (AP Photo/Patrick Semansky)

49ers wide receiver Randy Moss fields questions from reporters, Jan. 30, 2013, in New Orleans. (AP Photo/Mark Humphrey)

Ravens linebacker Ray Lewis speaks during an NFL Super Bowl XLVII football news conference, Jan. 30, 2013, in New Orleans. Lewis denied a report linking him to a company that purports to make performance-enhancers. The Ravens face the San Francisco 49ers in the Super Bowl on Sunday. (AP Photo/Patrick Semansky)

Ravens linebacker D.J. Bryant tries to stack apples and oranges as his teammates speak with reporters at a news conference, Jan. 30, 2013, in New Orleans. (AP Photo/Patrick Semansky)

Jack and Jackie Harbaugh, parents of Baltimore Ravens head coach John Harbaugh and San Francisco 49ers head coach Jim Harbaugh, yell out a family cheer during a news conference, Jan. 30, 2013. Their sons will be coaching against each other in the Super Bowl. (AP Photo/Gerald Herbert)

Ravens quarterback Joe Flacco, center, speaks with reporters at an Super Bowl XLVII news conference, Jan. 30, 2013, in New Orleans. (AP Photo/Patrick Semansky)

49ers quarterback Alex Smith talks with reporters, Jan. 30, 2013, in New Orleans. (AP Photo/Mark Humphrey)

Ravens head coach John Harbaugh speaks at a news conference, Jan. 30, 2013, in New Orleans. (AP Photo/Patrick Semansky)

49ers running back Anthony Dixon takes a break from the media questions to eat fruit, Jan. 30, 2013, in New Orleans. (AP Photo/Mark Humphrey)

49ers long snapper Brian Jennings (86) and punter Andy Lee (4) wait to be interviewed during a media availability, Jan. 30, 2013, in New Orleans. (AP Photo/Mark Humphrey)

49ers head coach Jim Harbaugh talks with reporters during a news conference, Jan. 30, 2013, in New Orleans. The 49ers play the Baltimore Ravens in the Super Bowl XLVII on Feb. 3. (AP Photo/Mark Humphrey)