Centuries By John Spencer In Season 1978-1979
| Tournament | Total | Breaks - Venue | Breaks - Qualifying | Rate |
|---|---|---|---|---|
 1979 World Championship |
1 | 112 | 24 | |
| 1979 Bombay International |
1 | 108 | 48 | |
| 1979 Irish Masters |
1 | 121 | 13 | |
| 1979 Holsten Lager International |
2 | 147, 109 | 17.5 | |
| 1979 Forward Chemicals Tournament |
2 | 122, 119 | 41 |