| Event | 2012 Dublin - Marathon |
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| Name | P.j. O' Brien | Club | Ambulance Service HSE | Race Number | 9344 | Date | 29/10/2012 |
| Gender | Male | Gender Position | 3435 of 8779 | Category | M55 | Category Position | 61 of 254 |
| to 10K | 00:52:54 | Stage Position | 4346 |
| 10K to Half | 00:58:22 | Stage Position | 4231 |
| Half to 20Mile | 00:59:12 | Stage Position | 3833 |
| Gun Time | 03:46:31 | Overall Position | 3847 |
| Chip Time | 03:46:21 | Chip Position | 3873 |