Video: Darlington Dale Jr Concussion Update

Dale Earnhardt Jr. (No. 88 Hendrick Motorsports Chevrolet), Rick Hendrick (owner of Hendrick Motorsports), Dr. Micky Collins (University of Pittsburgh Medical Center Sports Medicine Concussion Program), NASCAR Hall of Fame member Darrell Waltrip, Mark Martin, Bojangles’ Southern 500 Grand Marshal and 2017 NASCAR Hall of Fame inductee and Barry Williams, Bojangles’ Southern 500 National Anthem Performer.

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