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John Duffy's career best to date is 520 kg, set in 2019 at age 9. Their total grew 25 kg over 5.4 years between their first meet and that mark (~4.6 kg/year). 6.4-year gap in their competition record between 2019 and 2026.
Career-best meet: Paragon Open IV · PA
| Date | Meet | Equipment | Squat (kg) | Bench (kg) | Deadlift (kg) | Total (kg) | DOTS |
|---|---|---|---|---|---|---|---|
| 2014-04-05 | British Powerlifting Championships | Raw | 160 | 115 | 220 | 495 | 322.26 |
| 2019-08-31 | Paragon Open IV | Raw | 185 | 125 | 210 | 520 | 341.95 |
| 2026-01-10 | New Jersey High School and Youth State Championship | Raw | — | 90 | 172.5 | — | — |
vs Raw · 94 kg class · youth · drug-tested