| Full name: | Sydney Robert O'Callaghan |
| Born: | 6th July 1886, Christchurch, Canterbury, New Zealand |
| Died: | 28th January 1954, Christchurch, Canterbury, New Zealand |
| Relations: | Brother: LG O'Callaghan; Brother: AP O'Callaghan |
| Teams: | South Canterbury (Miscellaneous: 1913/14) |
| Lists of matches and more detailed statistics | |