| Event | 2012 Dublin - Marathon |
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| Name | Grattan O' Brien | Club | Race Number | 1334 | Date | 29/10/2012 | |
| Gender | Male | Gender Position | 663 of 8779 | Category | MS | Category Position | 268 of 3002 |
| to 10K | 00:45:27 | Stage Position | 1026 |
| 10K to Half | 00:49:09 | Stage Position | 827 |
| Half to 20Mile | 00:49:20 | Stage Position | 695 |
| Gun Time | 03:09:27 | Overall Position | 696 |
| Chip Time | 03:09:04 | Chip Position | 686 |