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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 |
