Green Bay Packers fullback John Kuhn scores a touchdown after being hit by Minnesota Vikings strong safety Jamarca Sanford during a wild card playoff game Saturday, Jan. 5, in Green Bay, Wis. The Packers won 24-10. (AP Photo/Matt Ludtke)

Seattle Seahawks running back Marshawn Lynch tumbles in the end zone for a touchdown during the second half of an NFL wild card playoff football game against the Washington Redskins in Landover, Md., Sunday, Jan. 6, 2013. The Seahawks defeated the Redskins 24-14. (AP Photo/Matt Slocum)

Houston Texans running back Arian Foster celebrates his one-yard touchdown run against the Cincinnati Bengals during the third quarter of wild card playoff game Saturday, Jan. 5, 2013, in Houston. The Texans won 19-13. (AP Photo/Eric Gay)

Baltimore Ravens wide receiver Anquan Boldin catches a touchdown pass as he is defended by Indianapolis Colts cornerback Darius Butler (20) during the second half of an NFL wild card playoff football game Sunday, Jan. 6, 2013, in Baltimore. The Ravens won 24-9. (AP Photo/Nick Wass)

San Francisco 49ers wide receiver Michael Crabtree scores on a 12-yard touchdown reception during the second quarter of an NFC divisional playoff game against the Green Bay Packers in San Francisco, Saturday, Jan. 12, 2013. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers quarterback Colin Kaepernick runs for a 56-yard touchdown against the Green Bay Packers during the third quarter of an NFC divisional playoff game in San Francisco, Saturday, Jan. 12, 2013. The Niners won 45-31. (AP Photo/Marcio Jose Sanchez)

Baltimore Ravens wide receiver Jacoby Jones celebrates as he crosses the goal line for a touchdown against the Denver Broncos in the fourth quarter of an AFC divisional playoff game, Saturday, Jan. 12, 2013, in Denver. (AP Photo/Joe Mahoney)

Baltimore Ravens kicker Justin Tucker reacts after hitting the winning field goal against the Denver Broncos in overtime of an AFC divisional playoff game, Saturday, Jan. 12, 2013, in Denver. The Ravens won 38-35. (AP Photo/Joe Mahoney)

Seattle Seahawks wide receiver Golden Tate gets past Atlanta Falcons free safety Thomas DeCoud for a touchdown reception during the second half of an NFC divisional playoff NFL football game Sunday, Jan. 13, 2013, in Atlanta. (AP Photo/David Goldman)

Atlanta Falcons kicker Matt Bryant reacts to his game winning field goal against the Seattle Seahawks during the second half of an NFC divisional playoff game Sunday, Jan. 13, 2013, in Atlanta. The Falcons won 30-28. (AP Photo/David Goldman)

New England Patriots running back Shane Vereen catches a 33-yard touchdown pass while being defended by Houston Texans linebacker Barrett Ruud during the second half of an AFC divisional playoff game in Foxborough, Mass., Sunday, Jan. 13, 2013. The Patriots went on to win 41-28. (AP Photo/Charles Krupa)

San Francisco 49ers' Frank Gore breaks away for a nine-yard touchdown run during the second half of the NFL football NFC Championship game against the San Francisco 49ers, Sunday, Jan. 20, 2013, in Atlanta. (AP Photo/Dave Martin)

The San Francisco 49ers bench erupts after the NFL football NFC Championship game against the Atlanta Falcons Sunday, Jan. 20, 2013, in Atlanta. The 49ers won 28-24 to advance to Super Bowl XLVII. (AP Photo/John Bazemore)

Baltimore Ravens wide receiver Torrey Smith (82) dives into the end zone for a touchdown as New England Patriots cornerback Devin McCourty (32) hangs on during the second half of the AFC Championship NFL football game Sunday, Jan. 22, 2012, in Foxborough, Mass. The Ravens won 28-13 to advance to Super Bowl XLVII against the San Francisco 49ers. (AP Photo/Charles Krupa)