Drivers Brad Keselowski, left, and Joey Logano talk in the garage during practice for Sunday's NASCAR Sprint Cup series auto race at Martinsville Speedway in Martinsville, Va., Friday, April 5, 2013. (AP Photo/Steve Helber)
Jimmie Johnson celebrates after winning the STP 500 NASCAR Sprint Cup series auto race at Martinsville Speedway in Martinsville, Va., Sunday, April 7, 2013. (AP Photo/Steve Helber)
Brad Keselowski watches during qualifying for Sunday's NASCAR Sprint Cup Series auto race at Martinsville Speedway, Friday, Oct. 26, 2012, in Martinsville, Va. (AP Photo/Autostock, Brian Czobat) MANDATORY CREDIT
Jimmie Johnson celebrates in Victory Lane after winning the NASCAR Sprint Cup Series auto race at Martinsville Speedway, Sunday, Oct. 28, 2012, in Martinsville, Va. (AP Photo/Don Petersen)
Driver Jimmie Johnson waits for his crew to finish his car during practice for Sunday's NASCAR Sprint Cup auto race at the Martinsville Speedway in Martinsville, Va., Friday, April 1, 2011. (AP Photo/Steve Helber)