Round 1 Chase leader Brad Keselowski doesn’t have a large body of work at Dover, just five starts in the NASCAR Sprint Cup, fewest among Chase qualifiers. He’s yet to show any degree of mastery of one of the schedule’s most difficult challenges. Keselowski finished 12th in June and 20th last September and just two laps led at the track. Keselowski’s Driver Rating (76.1) ranks 11th among Chase contenders. Penske Racing has a win and four top-five finishes, all with Kurt Busch, between 2009 and 2011. Busch won last year’s AAA 400. Penske’s seven Dover victories is tied for third all-time with the Wood Brothers.