| Personal Details | |
| Name | Marcus O Neill |
| Known As | Marcus |
| Eligibility Category | Open/Male |
| Membership Details | |||
| Member Number | 404656 | ||
| Member Status | Current | ||
| Ranked Club | Burton Amateur SC | ||
| Country of International Representation | |||
| Membership Categories |
| SE Club Train |
| Clubs & Organisations | |
| Club | Ranked |
| Burton Amateur SC | Yes |
| Click For Personal Best | 2024 Short Course | Short Course PB | 2024 Long Course | Long Course PB |
| 50m Freestyle | . | 31.48 | . | . |
| 100m Freestyle | . | 1:06.29 | . | . |
| 200m Freestyle | . | 2:22.19 | . | 2:32.19 |
| 400m Freestyle | . | 5:04.63 | . | . |
| 800m Freestyle | . | . | . | . |
| 1500m Freestyle | . | 20:04.63 | . | . |
| 50m Breaststroke | . | 40.68 | . | . |
| 100m Breaststroke | . | 1:27.64 | . | . |
| 200m Breaststroke | . | 3:11.50 | . | . |
| 50m Butterfly | . | . | . | . |
| 100m Butterfly | . | . | . | . |
| 200m Butterfly | . | . | . | . |
| 50m Backstroke | . | 36.46 | . | . |
| 100m Backstroke | . | 1:17.32 | . | . |
| 200m Backstroke | . | 2:49.03 | . | . |
| 200m Individual Medley | . | . | . | . |
| 400m Individual Medley | . | . | . | . |
| 100m Individual Medley | . | 1:19.84 | . | . |
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