John O'Brien (basketball)
John J. O'Brien (born November 4, 1888 in Brooklyn, New York, USA; died December 9, 1967) was an American basketball referee and administrator. He was involved in organizing several early professional basketball leagues. In 1925, he founded Metropolitan Basketball League, which featured Original Celtics. From 1928 to 1953 he was an executive with American Basketball League, serving as president and, later, as chairman of the board. He was enshrined into the Basketball Hall of Fame as a contributor in 1961.
President, Metropolitan Basketball League, 1922-1928, 1931–33 President and chairman of the board, American Basketball League, 1928–31, 1933–53 Dedicated himself to the advancement of professional basketball in the East Staunch supporter of referees and one of the first league administrators to begin fining players