Edwin Vernon "Shadow" Westfall (born September 19, 1940) is a Canadian retired professional ice hockey player who played 18 seasons in the National Hockey League with the Boston Bruins and the New York Islanders from 1961 until 1978–79.
Notable as a defensive specialist often tasked with defending against the star scorers of enemy teams, Westfall played most of his career as a right wing, although he played stints on defence in his earlier years and at centre in his later years.
He is known for being on the ice and covering the right defence position for Bobby Orr when Orr scored his legendary flying goal in the 1970 Stanley Cup Finals.