ST. PETERSBURG, Fla. (AP) -- Chevrolet has not received an official request from Dale Earnhardt Jr. to swap race cars with Honda driver Graham Rahal. Earnhardt and Rahal are both sponsored this year by Army National Guard, and Rahal reached out to Earnhardt last week via Twitter to see if NASCAR's most popular driver was interested in swapping cars. But Earnhardt quickly quieted the talk two days later when he said he could not drive a Honda. More...