Driver Greg Biffle (16) drives below Jeff Burton (31) who hits the wall during a NASCAR Sprint Cup Series auto race at Kansas Speedway in Kansas City, Kan., Sunday, Oct. 21, 2012. (AP P

 

              Driver Greg Biffle (16) drives below Jeff Burton (31) who hits the wall during a NASCAR Sprint Cup Series auto race at Kansas Speedway in Kansas City, Kan., Sunday, Oct. 21, 2012. (AP P
Driver Greg Biffle (16) drives below Jeff Burton (31) who hits the wall during a NASCAR Sprint Cup Series auto race at Kansas Speedway in Kansas City, Kan., Sunday, Oct. 21, 2012. (AP Photo/Colin E. Braley)