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

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Panelist Nahshon Ellerbe, a star running back at Trinity Christian Academy in Addison, Texas, warms up before a game against Midland Christian. Jeffrey McWhorter/Trinity Christian Academy hide caption

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Questions over out-of-regulation footballs have come up after the New England Patriots won the AFC Championship Game Sunday. Running back LeGarrette Blount ran for 148 yards and three touchdowns in the Patriots' 45-7 win over the Indianapolis Colts. Elsa/Getty Images hide caption

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Boyd Dowler of the Green Bay Packers grabs a Bart Starr touchdown pass in the NFL championship game on Dec. 31, 1967. The "Ice Bowl," played in frigid temperatures, was won by the Packers 21-17. AP hide caption

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Inside the control room, dozens of monitors allow the production team to keep an eye on the live games and the available replays and graphics. Becky Sullivan/NPR hide caption

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Jerry Dockery checks his frying turkey as he tailgates at Eastern Market before an NFL football game between the Detroit Lions and the Chicago Bears in Detroit on Thursday. Carlos Osorio/AP hide caption

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Minnesota Vikings running back Adrian Peterson arrives at the courthouse for an appearance Tuesday in Conroe, Texas. He pleaded no contest in his child abuse case, avoiding jail time. Pat Sullivan/AP hide caption

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Marcus Lattimore retired from the NFL Wednesday, ending his hopes of returning from a knee injury to play for the San Francisco 49ers. Jason O. Watson/Getty Images hide caption

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Minnesota Vikings running back Adrian Peterson arrives at the courthouse for an appearance Tuesday in Conroe, Texas. He pleaded no contest in his child abuse case, avoiding jail time. Pat Sullivan/AP hide caption

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Roger Goodell, the NFL's commissioner, met last week with the National Domestic Violence Hotline. But several black women's organizations said the groups the league is working with to craft its plan to combat domestic violence don't have footholds in black communities — an oversight for a league that is mostly black. Eric Gay/AP hide caption

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Husain Abdullah of the Kansas City Chiefs scores a touchdown after an interception against the New England Patriots Monday. He was then penalized for praying on his knees — something the NFL now says shouldn't have been punished. Dilip Vishwanat/Getty Images hide caption

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