| Event | 2013 Airtricity Dublin - Marathon |
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| Name | John O' Brien | Club | Race Number | 3467 | Date | 28/10/2013 | |
| Gender | Male | Gender Position | 182 of 8666 | Category | MS | Category Position | 83 of 2562 |
| 10K | 00:40:01 | Stage Position | 179 |
| Half | 01:24:58 | Stage Position | 186 |
| 20Mile | 02:14:14 | Stage Position | 281 |
| Gun Time | 02:54:57 | Overall Position | 189 |
| Chip Time | 02:54:44 | Chip Position | 189 |