All available race results John Brendan O'Sullivan
| Date | Race | Rank |
| 07/12 | Olympic Games Melbourne - Road Race | 41 |
Rider information for 1956
| Rank | 655 |
| Score | 24 |
| Name | John Brendan O'SULLIVAN |
| Country | Australia |
| Team | Individual |
| Date | Race | Rank |
| 30/08 | World Championships Road Race (Amateurs) | 35 |
Rider information for 1958
| Rank | 949 |
| Score | 10 |
| Name | John Brendan O'SULLIVAN |
| Country | Australia |
| Team | Individual |
| Date | Race | Rank |
| Sun Tour of Victoria | ||
| 15/10 | Stage 2 | 1 |
| 16/10 | Stage 4 | 2 |
| 23/10 | General Classification | 5 |
Rider information for 1960
| Rank | 622 |
| Score | 32 |
| Name | John Brendan O'SULLIVAN |
| Country | Australia |
| Team | Individual |
No results available in season 1961.
Rider information for 1961
| Rank | 1145 |
| Score | 2 |
| Name | John Brendan O'SULLIVAN |
| Country | Australia |
| Team | Individual |
No results available in season 1962.
Rider information for 1962
| Rank | 644 |
| Score | 22 |
| Name | John Brendan O'SULLIVAN |
| Country | Australia |
| Team | Individual |
No results available in season 1963.
Rider information for 1963
| Rank | 716 |
| Score | 11 |
| Name | John Brendan O'SULLIVAN |
| Country | Australia |
| Team | Individual |
No results available in season 1979.
Rider information for 1979
| Rank | 982 |
| Score | 1 |
| Name | John Brendan O'SULLIVAN |
| Country | Australia |
| Team | Individual |