Robert Fred Grottkau (born March 22, 1937) is a former American football guard in the National Football League for the Detroit Lions and Dallas Cowboys. He played college football at the University of Oregon.
Robert Fred Grottkau (born March 22, 1937) is a former American football guard in the National Football League for the Detroit Lions and Dallas Cowboys. He played college football at the University of Oregon. (en)
Robert Fred Grottkau (born March 22, 1937) is a former American football guard in the National Football League for the Detroit Lions and Dallas Cowboys. He played college football at the University of Oregon. (en)