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.
Michael O'Brien (photographer)
Michael O'Brien (born June 27, 1950) is an American photographer noted for his portraiture and documentary photography. Over the past four decades, O'Brien has photographed subjects from presidents, celebrities, and financiers to small-town Texans, including ranchers, beauty queens, writers, and bar owners. O'Brien has completed three books: "The Face of Texas: Portraits of Texans" (2003), updated with 24 new photographs in 2014; "Hard Ground" whose portraits of homeless individuals are paired with poems by Tom Waits (2011); and "The Great Minds of Investing" (2015), a collection of 33 portraits of famous investors such as Warren Buffett, Charlie Munger, Joel Greenblatt, and Bill Ackman, with accompanying profiles written by William Green.