Earnhardt Jr. visits concussion experts:

Earnhardt Jr. visits concussion experts: #88-Dale Earnhardt Jr. met with renowned concussion specialists at the University of Pittsburgh Medical Center's sports medicine concussion program Tuesday. Earnhardt was not given medical clearance to participate in this past Saturday's Sprint Cup race at Charlotte Motor Speedway or this week's race at Kansas after suffering multiple concussions over the past six weeks. He was accompanied to Pittsburgh by NASCAR primary physician Dr. Jerry Petty as a part of the original rehabilitation plan that was put in place last week. Earnhardt met with Dr. Michael Collins, the executive director of the concussion program that helped developed the ImPACT baseline test used in the IndyCar series and other contact sports.(ESPN)(10-2012)