Chad Knaus

Crew chief Chad Knaus (L), celebrates in Victory Lane with driver Jimmie Johnson's daughter Genevieve Johnson after the NASCAR Sprint Cup Series STP Gas Booster 500 on April 7, 2013 at Martinsville Speedway in Ridgeway, Virginia.

( Rainier Ehrhardt/NASCAR via Getty Images / April 8, 2013 )

Crew chief Chad Knaus (L), celebrates in Victory Lane with driver Jimmie Johnson's daughter Genevieve Johnson after the NASCAR Sprint Cup Series STP Gas Booster 500 on April 7, 2013 at Martinsville Speedway in Ridgeway, Virginia.

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