| Roles | Competed in Olympic Games (non-medal events) | |
|---|---|---|
| Sex | Male | |
| Full name | Gregory Joseph "Greg"•O'Halloran | |
| Used name | Greg•O'Halloran | |
| Born | 21 May 1968 in Toronto, Ontario |  CAN |
| Measurements | 185 cm / 81 kg | |
| Affiliations | Orange Coast College — Costa Mesa, California |  USA |
| NOC | Canada | CAN |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1988 Summer Olympics | Baseball (Baseball/Softball) | CAN |
Greg O'Halloran | |||
| Baseball, Men (Olympic (non-medal)) | Canada | =7 |
