| Event | 2012 Dublin - Half Marathon |
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| Name | Michael O' Brien | Club | Blackrock AC | Race Number | 13989 | Date | 15/09/2012 |
| Gender | Male | Gender Position | 2685 of 3837 | Category | M40 | Category Position | 435 of 660 |
| Gun Time | 02:02:14 | Overall Position | 3453 |
| Chip Time | 01:53:07 | Chip Position | 2915 |