| Event | 2013 Airtricity Dublin - Marathon |
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| Name | Brian O' Brien | Club | Race Number | 4964 | Date | 28/10/2013 | |
| Gender | Male | Gender Position | 651 of 8666 | Category | MS | Category Position | 227 of 2562 |
| 10K | 00:44:56 | Stage Position | 952 |
| Half | 01:33:46 | Stage Position | 875 |
| 20Mile | 02:22:59 | Stage Position | 747 |
| Gun Time | 03:10:02 | Overall Position | 674 |
| Chip Time | 03:09:21 | Chip Position | 639 |