JOLIET, Ill. — NASCAR added Jeff Gordon to the Chase for the Sprint Cup championship field Friday, a stunning and unprecedented step in the fallout from at least two attempts to manipulate the results of the regular season-ending race at Richmond last weekend. Chairman Brian France expanded the field to 13 drivers for the first time since the format was implemented in 2004. Front Row Motorsports appeared to ask for a deal from Penske Racing in the closing laps at Richmond as part of an apparent request from Penske to give Joey Logano pivotal track position he needed to earn a spot in the Chase.