Earnhardt Jr. said lingering symptoms kept him from racing
DARLINGTON, S.C. (AP) – A disappointed Dale Earnhardt Jr. understands his concussion symptoms are still too pervasive to return to the Sprint Cup Series this season, but feels confident about his racing future. Earnhardt spoke Sunday at Darlington Raceway, two days after announcing he would end his racing year and planned to return in time for the 2017 season. Earnhardt,…