Stewart subs for Dale Jr. at charity event

Dale Earnhardt Jr. was at Charlotte Motor Speedway on Tuesday for a Dale Jr. Foundation charity ride-along event. The problem: Earnhardt Jr. has not been cleared to drive by his doctors as he recovers from concussion-like symptoms. The event raises "quite a bit of money," Junior said in a video posted to Twitter. Never fear, 'Smoke' is here. The three-time NASCAR Sprint Cup Series champion volunteered to fill the seat so Tuesday's event could go off without a hitch. Earnhardt Jr. posted a thank-you video, calling Stewart a "good dude" for filling in. see video at NASCAR.com