Peyton Manning walks off the field following the Denver Broncos' divisional playoff win over the Pittsburgh Steelers. (Ric Tapia/NFL)

Arizona Cardinals wide receiver John Brown dives for the pylon against Green Bay Packers defensive end Datone Jones. (Mark J. Rebilas-USA TODAY Sports)

Carolina Panthers running back Jonathan Stewart (28) celebrates his touchdown with Carolina Panthers quarterback Cam Newton. (AP Photo/Bob Leverone)

Carolina Panthers running back Jonathan Stewart (28) breaks loose on a 59-yard carry. (Kirby Lee-USA TODAY Sports)

New England Patriots tight end Rob Gronkowski celebrates after scoring a touchdown against the Kansas City Chiefs. (Greg M. Cooper-USA TODAY Sports)

The Carolina Panthers' Thomas Davis (58) receives an onside kick from the Seattle Seahawks that preserved the Panthers' 31-24 win. (AP Photo/Mike McCarn)

Green Bay Packers receiver Jeff Janis catches a game-tying Hail Mary pass from quarterback Aaron Rodgers against the Arizona Cardinals. (Ric Tapia/NFL)

Pittsburgh Steelers quarterback Ben Roethlisberger is sacked by Denver Broncos outside linebacker DeMarcus Ware. (AP Photo/Joe Mahoney)

New England Patriots quarterback Tom Brady dives for a touchdown against the Kansas City Chiefs. (Greg M. Cooper-USA TODAY Sports)

Arizona Cardinals wide receiver Michael Floyd (15) celebrates his touchdown catch against the Green Bay Packers. (AP Photo/Ross D. Franklin)