William O'Brien (American football)
William Edward O'Brien (March 11, 1923 – December 1, 2000) was an American football coach and official. He was the seventh head football coach at the Southern Illinois University Carbondale, serving for three seasons, from 1952 to 1954, and compiling a record of 6–20. O'Brien was an official in the National Football League (NFL) for 18 seasons, from 1967 through 1983, officiating in Super Bowl X in 1976. He wore number 83 for the major part of his NFL career. He was also a professor at Southern Illinois University.
William O'Brien (Australian politician)
He was born in Parkes to carrier William O'Brien and Bridget, "née" O'Sullivan. He worked as a cabinetmaker and in the railways, and was an official in the Furniture Trades' Union, being a delegate to and later president of the Trades and Labor Council. In 1916 he was a foundation member of the Industrial Vigilance Council and a delegate to the Anti-Conscription League, and from 1913 to 1917 he served on the central executive of the Australian Labor Party (vice-president 1916–17). In 1917 he was elected to the New South Wales Legislative Assembly as the member for Annandale, transferring to Murray with the introduction of proportional representation in 1920. O'Brien served until 1925. He died at Leichhardt in 1953.