John O'Brien (boxer)

John O'Brien (20 February 1937 – 30 March 1979 (aged 42)) born in Glasgow was a Scottish professional feather/super feather/light/light welterweight boxer of the 1960s and '70s, who won the British Commonwealth featherweight title, and was a challenger for the BBBofC British featherweight title against; Howard Winstone, and Jimmy Revie and European Boxing Union (EBU) featherweight title against Howard Winstone. His professional fighting weight varied from 124 lb, i.e. featherweight to 136 lb, i.e. light welterweight.