| Event | 2012 Dublin - Marathon |
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| Name | John O' Brien | Club | Race Number | 9934 | Date | 29/10/2012 | |
| Gender | Male | Gender Position | 5768 of 8779 | Category | M40 | Category Position | 1101 of 1608 |
| to 10K | 00:56:37 | Stage Position | 6605 |
| 10K to Half | 01:02:00 | Stage Position | 6242 |
| Half to 20Mile | 01:06:13 | Stage Position | 6692 |
| Gun Time | 04:14:13 | Overall Position | 7034 |
| Chip Time | 04:12:44 | Chip Position | 6937 |