| Event | 2012 Dublin - Marathon |
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| Name | Michael O' Brien | Club | Gardai | Race Number | 17787 | Date | 29/10/2012 |
| Gender | Male | Gender Position | 1530 of 8779 | Category | M35 | Category Position | 395 of 2079 |
| to 10K | 00:47:46 | Stage Position | 1789 |
| 10K to Half | 00:52:19 | Stage Position | 1765 |
| Half to 20Mile | 00:52:46 | Stage Position | 1499 |
| Gun Time | 03:24:40 | Overall Position | 1626 |
| Chip Time | 03:24:33 | Chip Position | 1650 |