The defending champion and favorite remains the chicken wing. But underdog snacks like the carrot are trying to elbow their way into the competition. Leif Parsons for NPR; Source: whologwhy/Flickr hide caption

itoggle caption Leif Parsons for NPR; Source: whologwhy/Flickr

Bill Parcells has been coach to the Dallas Cowboys, the New York Giants, the New England Patriots and the New York Jets. Robert B. Stanton/Getty Images hide caption

itoggle caption Robert B. Stanton/Getty Images

Tom Brady of the New England Patriots hands the ball off to LeGarrette Blount during the AFC Championship Game. The Patriots are being investigated because of game balls that were improperly inflated. Elsa/Getty Images hide caption

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New England Patriots head coach Bill Belichick, seen here on Jan. 18, says he "had no knowledge" about the controversy over deflated footballs "until Monday morning." Elise Amendola/AP hide caption

itoggle caption Elise Amendola/AP

Luke Willson (#82) of the Seattle Seahawks celebrates after scoring on a two-point conversion during the fourth quarter of the 2015 NFC Championship game against the Green Bay Packers on Sunday. Seattle won 28-22. Tom Pennington/Getty Images hide caption

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Super Bowl volunteer Ben Schreiber distributes fan guides for Super Bowl XLVI festivities in 2012. Chad Ryan/CSM/Landov hide caption

itoggle caption Chad Ryan/CSM/Landov

The Red Hot Chili Peppers band members Flea, center, and Anthony Kiedis perform during the halftime show of the Super Bowl on Sunday. Julio Cortez/AP hide caption

itoggle caption Julio Cortez/AP

Georgia attorney Jamie Casino's TV ad featuring a sledgehammer, fire and a personal story of vindication has won fans online with its over-the-top production style. YouTube hide caption

itoggle caption YouTube

Denver Broncos quarterback Peyton Manning during Sunday's Super Bowl. Some players on the Seattle Seahawks say they studied his hand signals. That helped them shut down the Broncos defense, they say. Kevin C. Cox/Getty Images hide caption

itoggle caption Kevin C. Cox/Getty Images

Seahawks quarterback Russell Wilson stiff-arms Broncos cornerback Champ Bailey on Sunday during Super Bowl XLVIII at MetLife Stadium in East Rutherford, N.J. Jeff Zelevansky/Getty Images hide caption

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New York and national politicians join the NFL Super Bowl host committee in New York's Times Square Saturday. When it comes to political contributions, the owners of Sunday's Super Bowl contenders are plenty active. Christopher Gregory/Getty Images hide caption

itoggle caption Christopher Gregory/Getty Images

The current record holder for loudest crowd in history are the fans of the Seattle Seahawks, who cheered so loud that they induced a mini-earthquake. But that level of noise can permanently damage fans' hearing. Scott Eklund/AP hide caption

itoggle caption Scott Eklund/AP