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

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Seattle Seahawks cornerback Richard Sherman has been fined by the NFL for unsportsmanlike behavior after his team's win over San Francisco in the NFC title game. He's seen here on the sideline after tipping a pass that led to a game-clinching interception. Otto Greule Jr/Getty Images hide caption

itoggle caption Otto Greule Jr/Getty Images