| Event | 2012 Dublin - Marathon |
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| Name | David O' Brien | Club | Race Number | 13335 | Date | 29/10/2012 | |
| Gender | Male | Gender Position | 5571 of 8779 | Category | MS | Category Position | 1939 of 3002 |
| to 10K | 00:58:56 | Stage Position | 7889 |
| 10K to Half | 01:04:15 | Stage Position | 7450 |
| Half to 20Mile | 01:07:01 | Stage Position | 7005 |
| Gun Time | 04:11:00 | Overall Position | 6733 |
| Chip Time | 04:10:02 | Chip Position | 6685 |