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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 18y 271d | Philadelphia WCT 1974 | |
| 2 | 19y 270d | Philadelphia WCT 1975 | |
| 3 | 20y 146d | Philadelphia WCT 1975 | |
| 4 | 20y 256d | Philadelphia WCT 1975 | |
| 5 | 21y 36d | Philadelphia WCT 1975 | |
| 6 | 21y 125d | Philadelphia WCT 1974 | |
| 7 | 21y 156d | Philadelphia WCT 1974 | |
| 8 | 21y 334d | Philadelphia WCT 1975 | |
| 9 | 21y 359d | Philadelphia WCT 1974 | |
| 10 | 22y 81d | Philadelphia WCT 1974 | |
| 11 | 22y 289d | Philadelphia WCT 1975 | |
| 12 | 22y 326d | Philadelphia WCT 1974 | |
| 13 | 22y 334d | Philadelphia WCT 1974 | |
| 14 | 22y 358d | Philadelphia WCT 1975 | |
| 15 | 23y 80d | Philadelphia WCT 1975 | |
| 16 | 23y 146d | Philadelphia WCT 1975 | |
| 17 | 23y 170d | Philadelphia WCT 1975 | |
| 18 | 23y 235d | Philadelphia WCT 1975 | |
| 19 | 23y 336d | Philadelphia WCT 1975 | |
| 20 | 23y 341d | Philadelphia WCT 1974 |