Cowboys guard Jonathan Cooper okay after being helped off field Posted Jan 1, 2018 Cowboys starting left guard Jonathan Cooper injured his left knee Sunday and had to be helped off the field and into the locker room by trainers. Cooper said after the game, however, that he escaped without suffering a serious injury to his knee. Cooper started 13 games for the Cowboys and the former first-round pick will be an unrestricted free agent in the offseason. (Dallas Morning News)