Dale Earnhardt Jr. suffered two concussions in 2012, one during a test at Kansas Speedway, the other at Talladega (Ala.) Superspeedway.
Dale Earnhardt Jr. suffered two concussions in 2012, one during a test at Kansas Speedway, the other at Talladega (Ala.) Superspeedway. Mike McCarn AP
Dale Earnhardt Jr. suffered two concussions in 2012, one during a test at Kansas Speedway, the other at Talladega (Ala.) Superspeedway. Mike McCarn AP