Nfl

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Jackie (left) and Jack Harbaugh, parents of San Francisco 49ers coach Jim Harbaugh and Baltimore Ravens coach John Harbaugh, stand before an NFL football game between the 49ers and the Seattle Seahawks in San Francisco in 2011. (AP Photo/Paul Sakuma)

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Running the zone-read scheme to peak efficiency in a divisional playoff victory over Green Bay, San Francisco’s Colin Kaepernick gained 181 yards rushing — the most ever gained in a single game by a quarterback in NFL history. (Associated Press)

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FILE - In this Oct. 7, 2012 file photo, suspended New Orleans Saints coach Sean Payton watches from the stands during an NFL football game between the Saints and the San Diego Chargers at the Mercedes-Benz Superdome in New Orleans. NFL Commissioner Roger Goodell has reinstated Payton following a season-long suspension for his role in the team's bounty scandal. The announcement comes Tuesday, Jan. 22, 2013, a day after Payton met with Goodell. (AP Photo/Dave Martin, File)

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Baltimore Ravens inside linebacker Ray Lewis waits for the start of the NFL football AFC Championship football game against the New England Patriots in Foxborough, Mass., Sunday, Jan. 20, 2013. (AP Photo/Matt Slocum)

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FILE - In this Nov. 24, 2011 file photo, Baltimore Ravens head coach John Harbaugh, left, and his brother, San Francisco 49ers head coach Jim Harbaugh, talk with their father, Jack, right, before their NFL football game in Baltimore. The Harbaughs, San Francisco's Jim and Baltimore's John, will be the first pair of brothers to coach against each other in the NFL title game. (AP Photo/Patrick Semansky, File)

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New England Patriots quarterback Tom Brady, right, runs with the ball while being chased by Baltimore Ravens linebacker Terrell Suggs (55) during the first half of the NFL football AFC Championship football game against the Baltimore Ravens in Foxborough, Mass., Sunday, Jan. 20, 2013. (AP Photo/Matt Slocum)

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In a photo taken with a fisheye lens, Baltimore Ravens inside linebacker Ray Lewis celebrates after the Ravens beat the Denver Broncos 38-35 in overtime of an AFC divisional playoff NFL football game, Saturday, Jan. 12, 2013, in Denver. (AP Photo/Charlie Riedel)