Teammates Greg Biffle, left, and Matt Kenseth chat before practice for the NASCAR Sprint Cup Series auto race at Dover International Speedway, Friday, Sept. 28, 2012, in Dover, Del. (AP ... more 

Teammates Greg Biffle, left, and Matt Kenseth chat before practice for the NASCAR Sprint Cup Series auto race at Dover International Speedway, Friday, Sept. 28, 2012, in Dover, Del. (AP Photo/Autostock, Brian Czobat) MANDATORY CREDIT less