| John O'Brien | |
| Weight: | feather/super feather/light/light welterweight |
| Nationality: | Scottish |
| Birth Date: | 20 February 1937 |
| Birth Place: | Glasgow, Scotland |
| Death Date: | 30 March 1979 (aged 42) |
| Style: | Southpaw |
| Total: | 47 |
| Wins: | 30 (KO 15) |
| Losses: | 17 (KO 8) |
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 124NaN, i.e. featherweight to 1361NaN1, i.e. light welterweight.[2]
