One seven-time champion will fill in for another. Jimmie Johnson is taking over Grand Marshal duties for Richard Petty who had to leave Kansas. Petty is joining his son Kyle’s charity ride. The NASCAR race at Kansas is under delay due to rain. Since Richard Petty had to go meet with Kyle Petty for the charity ride, Jimmie Johnson is going to give drivers the command to start their engines. NASCAR is waiting for the rain to go away and then they will have to dry the track for about an hour to get it into race condition. Legacy Motor Club put out a statement via Kansas Speedway. “Richard Petty i…