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[1] and European Boxing Union (EBU) featherweight title against Howard Winstone.
His professional fighting weight varied from 124 lb (56 kg; 8 st 12 lb), i.e. featherweight to 136 lb (61.7 kg; 9 st 10.0 lb), i.e. light welterweight.
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