John O'Brien (boxer)
John O'Brien 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 featherweight title against Howard Winstone. His professional fighting weight varied from, i.e. featherweight to, i.e. light welterweight.
