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| Date | Meet | Equipment | Squat (kg) | Bench (kg) | Deadlift (kg) | Total (kg) | DOTS |
|---|---|---|---|---|---|---|---|
| 2020-12-12 | Panthers Summer Classic III | Raw | 105 | 70 | 152.5 | 327.5 | 359.67 |
| 2021-03-27 | QLD State Championships | Raw | 105 | 70 | 157.5 | 332.5 | 365.61 |
| 2021-11-21 | Collate National Championships | Raw | 107.5 | 70 | 160 | 337.5 | 365.65 |
| 2022-04-30 | QLD Powerlifting & Bench Press Championships | Raw | 155 | 90 | 175 | 420 | 449.34 |
| 2022-07-24 | National Equipped Powerlifting and Bench Press Championships | Single-ply | 152.5 | 95 | 180.5 | 428 | 465.78 |
| 2022-10-08 | World Masters Classic & Equipped Powerlifting Championships | Single-ply | 150 | 90 | 172.5 | 412.5 | 447.66 |
| 2023-12-02 | QLD Christmas Cup Tested | Single-ply | 157.5 | 90 | 172.5 | 420 | 450.41 |
| 2023-12-09 | National Deadlift Only Championships | Single-ply | — | — | 177.5 | — | 189.9 |
| 2024-06-09 | Revenant 2 | Single-ply | 160 | 100 | 170 | 430 | 454.27 |
| 2024-08-01 | National Championships | Single-ply | 162.5 | 97.5 | 180 | 440 | 464.41 |
| 2025-07-31 | National Championships | Single-ply | 162.5 | 90 | 175 | 427.5 | 451.63 |
| 2025-12-06 | National Deadlift Championship | Multi-ply | — | — | 172.5 | — | 180.39 |
Merinda O'Brien's career best to date is 440 kg, set in 2024 at age 44. Their total grew 112.5 kg over 3.6 years between their first meet and that mark (~30.9 kg/year). Career variance was 75% squat-driven.
Career-best meet: National Championships · CAPO
vs Single-ply · 67.5 kg class · masters-1 · drug-test status unknown