Kansas City Chiefs coach Romeo Crennel wipes his eyes on an emotional Sunday at Arrowhead Stadium. (AP Photo/Colin E. Braley)

Indianapolis Colts running back Vick Ballard jumps over Detroit Lions free safety Louis Delmas. (Andrew Weber/US Presswire)

Pittsburgh Steelers cornerback Cortez Allen breaks up a pass intended for Baltimore Ravens wide receiver Torrey Smith. (Evan Habeeb/US Presswire)

Seattle Seahawks running back Marshawn Lynch is tackled by Chicago Bears free safety Chris Conte. (AP Photo/Nam Y. Huh)

Houston Texans quarterback Matt Schaub gets a pass away as Tennessee Titans defensive tackle Sen'Derrick Marks blocks Schaub's view. (AP Photo/Joe Howell)

Pittsburgh Steelers running back Isaac Redman is stopped in his tracks by a host of Baltimore Ravens defenders. (AP Photo/Nick Wass)

Cleveland Browns running back Trent Richardson leaps in front of Oakland Raiders linebacker Miles Burris. (AP Photo/Marcio Jose Sanchez)

Buffalo Bills wide receiver Stevie Johnson celebrates a touchdown catch with fans. (AP Photo/Bill Wippert)

Miami Dolphins quarterback Ryan Tannehill leaps for a touchdown over New England Patriots defensive end Rob Ninkovich. (AP Photo/John Bazemore)

Chicago Bears receiver Earl Bennett leaps into an end zone for a touchdown against the Seattle Seahawks. (Todd Rosenberg/NFL)