Fans cheer on the Washington Redskins from the top row of FedExField before a wild-card showdown against the Seattle Seahawks. (Daniel Shirey/US Presswire)

Minnesota Vikings running back Adrian Peterson stiff arms Green Bay Packers linebacker Erik Walden. (Jeff Hanisch/US Presswire)

Houston Texans defensive back Shiloh Keo tackles Cincinnati Bengals wide receiver Andrew Hawkins. (Brett Davis/US Presswire)

Green Bay Packers tight end Tom Crabtree jumps over a Minnesota Vikings defender at Lambeau Field. (Andrew Weber/US Presswire)

Indianapolis Colts quarterback Andrew Luck prepares for a snap against the Baltimore Ravens. (Evan Habeeb/US Presswire)

Green Bay Packers fullback John Kuhn dives over Minnesota Vikings safety Jamarca Sanford and into the end zone for a touchdown. (Benny Sieu/US Presswire)

Houston Texans defensive end J.J. Watt takes the field prior to the wild-card playoff game against the Cincinnati Bengals at Reliant Stadium. (Aaron M. Sprecher/NFL)

Baltimore Ravens receiver Anquan Boldin celebrates after scoring on an 18-yard touchdown reception against the Indianapolis Colts. (Kirby Lee/US Presswire)

Washington Redskins quarterback Robert Griffin III sits on the bench after being injured during a wild-card playoff game against the Seattle Seahawks. (AP Photo/Evan Vucci)

Baltimore Ravens linebacker Ray Lewis is introduced for his final home game. (Kirby Lee/US Presswire)