San Francisco 49ers’ Delanie Walker (46) pushes off Baltimore Ravens’ Cary Williams (29) on a run in the first quarter at Super Bowl XLVII on
San Francisco 49ers' Delanie Walker (46) pushes off Baltimore Ravens' Cary Williams (29) on a run in the first quarter at Super Bowl XLVII on Sunday, Feb. 3, 2013, at the Superdome in New Orleans. (Jim Gensheimer/Bay Area News Group)