| Event | 2012 Dublin - Marathon |
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| Name | Tom O' Brien | Club | Race Number | 3229 | Date | 29/10/2012 | |
| Gender | Male | Gender Position | 1007 of 8779 | Category | M40 | Category Position | 201 of 1608 |
| to 10K | 00:45:31 | Stage Position | 1042 |
| 10K to Half | 00:50:36 | Stage Position | 1250 |
| Half to 20Mile | 00:50:08 | Stage Position | 828 |
| Gun Time | 03:15:23 | Overall Position | 1055 |
| Chip Time | 03:15:22 | Chip Position | 1062 |