| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | David•O'Brien | |
| Used name | David•O'Brien | |
| Born | 26 May 1965 in Dublin, Dublin City |  IRL |
| Measurements | 185 cm / 100 kg | |
| Affiliations | National Yacht Club, Dun Laoghaire | |
| NOC | Ireland | IRL |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 2000 Summer Olympics | Sailing | IRL |
David O'Brien | |||
| Two-Person Keelboat, Men (Olympic) | Mark Mansfield | 14 |
