Indianapolis Colts quarterback Andrew Luck signals at the line of scrimmage during his team's game against the San Francisco 49ers. (AP Photo/Ben Margot)

Cincinnati Bengals running back Giovani Bernard dives into the end zone past Green Bay Packers free safety M.D. Jennings for a 3-yard touchdown run. (AP Photo/Al Behrman)

Dallas Cowboys wide receiver Dez Bryant (88) makes a touchdown reception as the St. Louis Rams' Cortland Finnegan tumbles into the end zone. (AP Photo/LM Otero)

Miami Dolphins middle linebacker Dannell Ellerbe (59) reacts after his team defeated the Atlanta Falcons at Sun Life Stadium. (Steve Mitchell/USA TODAY Sports)

Chicago Bears running back Matt Forte (22) goes in for a touchdown over Pittsburgh Steelers free safety Ryan Clark (25). (AP Photo/Gene J. Puskar)

Miami Dolphins wide receiver Brian Hartline celebrates a touchdown against the Atlanta Falcons. (Perry Knotts/NFL)

New Orleans Saints quarterback Drew Brees (9) pumps up his teammates before their game against the Arizona Cardinals. (Chuck Cook/USA TODAY Sports)

Tennessee Titans wide receiver Kenny Britt (18) leaps to catch a pass against San Diego Chargers defensive back Jahleel Addae. (Jim Brown/USA TODAY Sports)

Baltimore Ravens wide receiver Torrey Smith (82) reaches for a pass while being defended by Houston Texans cornerback Johnathan Joseph. (Evan Habeeb/USA TODAY Sports)

Dallas Cowboys running back DeMarco Murray scores a touchdown while being tackled by St. Louis Rams strong safety T.J. McDonald. (Tim Heitman/USA TODAY Sports)