Super Bowl: San Francisco's Perrish Cox thankful to be back in football - Article Photos 4/4

In this Sept. 11, 2011, file photo, Baltimore Ravens linebacker Ray Lewis screams after intercepting a pass by Pittsburgh Steelers quarterback Ben Roethlisberger during the second half of an NFL football game in Baltimore. Lewis will retire after the Ravens play the San Francisco 49ers in Super Bowl XLVII on Sunday in New Orleans. (AP Photo/Nick Wass, File)