Raiders' Khalil Mack impressing coaches, including Pete Carroll

Raiders coach Tony Sparano admits that he is one to look at silver linings, even though they might be more and more difficult to find in a season that has yielded no wins through seven games. The play of rookie linebacker Khalil Mack qualifies as a definite bright spot for the Raiders, who play the defending Super Bowl champion Seattle Seahawks on Sunday in their ongoing quest to get a win.

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