| 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 (USA) |
| NOC | Canada |
| 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 |