Fans of Redskins quarterback Robert Griffin III (10) hold signs during a game against the Saints at the Mercedes-Benz Superdome in New Orleans, Sept. 9, 2012. (AP Photo/Bill Haber)

Fans hold signs welcoming back the ref's during a game between the Cardinals and Dolphins, Sept. 30, 2012, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Bears fans and Texans fans hold signs cheering their teams in Chicago, Nov. 11, 2012. (AP Photo/Charles Rex Arbogast)

Lions fans hold of defense signs in the second half of a game against the Packers at Ford Field in Detroit, Nov. 18, 2012. (AP Photo/Rick Osentoski)

Packers fans hold signs during a game against the Seahawks, Sept. 24, 2012, in Seattle. (AP Photo/Ted S. Warren)

A Cowboys and Browns fan holds signs that read "House Divided, Go Cowboys, Go Browns", Nov. 18, 2012, in Arlington, Texas. The Cowboys won in overtime 23-20. (AP Photo/Sharon Ellman)

Fans hold up signs supporting our troops during a game between the Bears and Texans as part of the NFL's Salute to Service campaign on Veterans Day in Chicago, Nov. 11, 2012. (AP Photo/Nam Y. Huh)

A fan holds up a foam finger amidst pink breast cancer awareness signs before a game between the Texans and Packers, Oct. 14, 2012, in Houston. (AP Photo/Dave Einsel)

Patriots fans show off signs before a game between the Jets and the Patriots, Nov. 22, 2012 in East Rutherford, N.J. (AP Photo/Julio Cortez)

Bears fans hold up signs during a game against the Vikings in Chicago, Nov. 25, 2012. (AP Photo/Nam Y. Huh)

Fans hold up signs supporting troops during the first half an NFL football game between the Bears and Texans as part of the NFL's Salute to Service campaign on Veterans Day, Nov. 11, 2012, in Chicago. (AP Photo/Nam Y. Huh)