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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 7y 273d | Berkeley 1968 | |
| 2 | 10y 259d | St. Louis WCT 1972 | |
| 3 | 10y 294d | Johannesburg-2 1976 | |
| 4 | 11y 300d | Johannesburg-2 1977 | |
| 5 | 13y 153d | San Juan 1968 | |
| 6 | 14y 152d | San Juan 1969 | |
| 7 | 15y 17d | London-2 1968 | |
| 8 | 15y 59d | Livingston 1988 | |
| 9 | 15y 66d | Rye Brook 1988 | |
| 10 | 15y 108d | Scottsdale 1988 | |
| 11 | 15y 137d | Los Angeles-2 1968 | |
| 12 | 15y 141d | Bloemfontein 1968 | |
| 13 | 15y 145d | Stockholm WCT 1971 | |
| 14 | 15y 151d | San Juan 1970 | |
| 15 | 15y 183d | Rye Brook 1987 | |
| 16 | 15y 211d | Los Angeles 1987 | |
| 17 | 15y 219d | La Jolla 1968 | |
| 18 | 15y 225d | Scottsdale 1987 | |
| 19 | 15y 227d | Tampa 1980 | |
| 20 | 15y 230d | Montreal 1989 |
