Joseph Gail O'Brien (November 14, 1911 – July 7, 1978) was an American football tackle in the National Football League (NFL) for the Boston Redskins. He played college football at the University of Nebraska. After retiring from professional football, O'Brien became the offensive line coach at Loyola University of Los AngelesâÂÂnow known as Loyola Marymount UniversityâÂÂin 1946, under head coach Tony DeLellis.