Centuries By Ronnie O'Sullivan In Season 1998-1999
| Tournament | Total | Breaks - Venue | Breaks - Qualifying | Rate |
|---|---|---|---|---|
 1999 World Championship |
7 | 135, 134, 122, 120, 110, 105, 100 | 12.29 | |
| 1999 British Open |
2 | 134, 109 | 10 | |
| 1999 Charity Challenge |
1 | 104 | 30 | |
| 1999 Welsh Open |
4 | 147, 144, 143, 110 | 9.25 | |
| 1999 Premier League |
3 | 133, 117, 102 | 18.33 | |
| 1998 Grand Prix |
1 | 134 | 22 |