In this Monday, Feb. 24, 2014 photo provided by CBS, Daytona 500 winner Dale Earnhardt Jr., left, joins host David Letterman on the set of the “Late Show with David Letterman" in New York. Earnhardt discussed winning his second Daytona 500. (AP Photo/CBS, Jeffrey R. Staab) MANDATORY CREDIT, NO SALES, NO ARCHIVE, FOR NORTH AMERICAN USE ONLY