HAMPTON, Ga. — Kevin Harvick completed his weekend mastery of Atlanta Motor Speedway by holding off Brad Keselowski on Sunday in the rain-delayed NASCAR Monster Energy Cup race. Harvick, who was dominant Saturday in winning the second-tier Xfinity event, started fourth in the Cup race and quickly proved he had the car to beat. Harvick was comfortably in the lead when Trevor Bayne’s engine blew with 28 laps to go.