By Scott WrightStaff writerswright@oklahoman.comSTILLWATER — It seems LD Brown is never not smiling.Even as the redshirt junior running back spoke about his biggest struggles during his Oklahoma State career, he did it through a grin.“Injuries,” said Brown, who has rushed for 385 yards and averaged more than six yards per carry in limited action the last two seasons.Read more on NewsOK.com