| Event | 2012 Dublin - Marathon |
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| Name | Michael O' Brien | Club | Race Number | 9548 | Date | 29/10/2012 | |
| Gender | Male | Gender Position | 6940 of 8779 | Category | M40 | Category Position | 1314 of 1608 |
| to 10K | 00:57:14 | Stage Position | 7105 |
| 10K to Half | 01:03:47 | Stage Position | 7277 |
| Half to 20Mile | 01:13:55 | Stage Position | 8839 |
| Gun Time | 04:35:33 | Overall Position | 8976 |
| Chip Time | 04:33:25 | Chip Position | 8836 |