Info
| Last name | O'Brien |
| First name | Mark |
| Nationality |  Australia |
| Date of birth | 16-09-1987 |
| Age | 38 |
| Place of birth | Horsham |
About Mark O'Brien
Mark O'Brien is a Australian professional cyclist, 38 years old. Turned professional in 2007. Mark has won 2 career victories. Active in gravel, cyclocross, road cycling.
