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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 15y 306d | Fort Lauderdale 1971 | |
| 2 | 16y 108d | Cincinnati 1969 | |
| 3 | 16y 276d | Rome 1968 | |
| 4 | 16y 307d | Rome 1968 | |
| 5 | 16y 360d | Rome 1973 | |
| 6 | 17y 261d | Rome 1969 | |
| 7 | 17y 301d | Rome 1968 | |
| 8 | 18y 10d | Cincinnati 1969 | |
| 9 | 18y 81d | Rome 1968 | |
| 10 | 18y 122d | Fort Lauderdale 1971 |
