All available race results Mark O'Brien
No results available in season 2005.
Rider information for 2005
| Rank | 2320 |
| Score | 2 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Elite without contract |
| Date | Race | Rank |
| 28/10 | Japan Cup | 25 |
Rider information for 2007
| Rank | 3229 |
| Score | 0 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Drapac Porsche Development Program |
Rider information for 2008
| Rank | 3387 |
| Score | 0 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Drapac Porsche Development Program |
| Date | Race | Rank |
| Tour of Wellington | ||
| 22/01 | Stage 2 | 19 |
| 23/01 | Stage 3 | 19 |
| 24/01 | Stage 4 | 59 |
| 24/01 | Stage 5 | 32 |
| 25/01 | Stage 6 | 33 |
| 25/01 | Stage 7 | 16 |
| General Classification | 14 | |
| Boucles de la Mayenne | ||
| 18/06 | Prologue | 113 |
| 19/06 | Stage 2 | 104 |
| 20/06 | Stage 3 | 107 |
| 21/06 | Stage 4 | 90 |
| General Classification | 94 | |
| Okolo Slovenska | ||
| 02/09 | Stage 1 | 86 |
| 26/09 | World Championships U23 Road Race | 25 |
Rider information for 2009
| Rank | 1229 |
| Score | 15 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Drapac Porsche Cycling |
| Date | Race | Rank |
| 10/01 | National Championship Australia | 10 |
| Tour de Langkawi | ||
| 01/03 | Stage 1 | 80 |
| 02/03 | Stage 2 | 83 |
| 03/03 | Stage 3 | 30 |
| 04/03 | Stage 4 | 55 |
| 05/03 | Stage 5 | 104 |
| 06/03 | Stage 6 | 23 |
| 07/03 | Stage 7 | 40 |
| General Classification | 22 |
Rider information for 2010
| Rank | 2856 |
| Score | 2 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Letua Cycling Team |
| Date | Race | Rank |
| 09/01 | National Championship Australia | 21 |
| 01/04 | Route Adélie de Vitré | 60 |
| Tour of Hellas | ||
| 13/04 | Stage 1 | 41 |
| 14/04 | Stage 2 | 50 |
| 14/04 | Stage 2 | 88 |
| 15/04 | Stage 3 | 92 |
| 16/04 | Stage 4 | 42 |
| 17/04 | Stage 5 | 66 |
| General Classification | 66 | |
| Turul Romaniei | ||
| 04/06 | Stage 2 | 9 |
| 06/06 | Stage 4 | 5 |
| 10/06 | Stage 8 | 5 |
| 11/06 | General Classification | 6 |
| Tour of Szeklerland | ||
| 12/08 | Stage 2 | 8 |
Rider information for 2011
| Rank | 2108 |
| Score | 5 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | SP Tableware |
| Date | Race | Rank |
| 08/01 | National Championship Australia | 12 |
| 18/03 | Oceania Continental Championships Road Race | 3 |
| 21/10 | Japan Cup | 19 |
Rider information for 2012
| Rank | 2007 |
| Score | 6 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Team Budget Forklifts |
| Date | Race | Rank |
| 13/01 | National Championship Australia | 13 |
| Tour du Haut-Var | ||
| 16/02 | Stage 1 | 77 |
| 24/02 | Classic Sud Ardèche - Souvenir Francis Delpech | 42 |
| 17/03 | Cholet-Pays de la Loire | 51 |
Rider information for 2013
| Rank | 4725 |
| Score | 0 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Team Raleigh |
| Date | Race | Rank |
| 12/01 | National Championship Australia | 7 |
| Tour Down Under | ||
| 21/01 | Stage 1 | 48 |
| 22/01 | Stage 2 | 54 |
| 23/01 | Stage 3 | 35 |
| 24/01 | Stage 4 | 104 |
| 25/01 | Stage 5 | 61 |
| 26/01 | Stage 6 | 125 |
| 26/01 | General Classification | 65 |
| 11/10 | Melbourne - Warrnambool | 5 |
Rider information for 2014
| Rank | 1035 |
| Score | 32 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Avanti Racing Team |
| Date | Race | Rank |
| 11/01 | National Championship Australia | 25 |
| Herald Sun Tour | ||
| 04/02 | Prologue | 87 |
| 05/02 | Stage 1 | 18 |
| 06/02 | Stage 2 | 42 |
| 07/02 | Stage 3 | 36 |
| 08/02 | Stage 4 | 14 |
| General Classification | 15 | |
| 15/02 | Oceania Continental Championships Road Race | 42 |
| Tour de Taiwan | ||
| 22/03 | Stage 1 | 89 |
| 23/03 | Stage 2 | 32 |
| 24/03 | Stage 3 | 92 |
| 25/03 | Stage 4 | 60 |
| Tour of Japan | ||
| 17/05 | Prologue | 96 |
| 19/05 | Stage 2 | 11 |
| 20/05 | Stage 3 | 64 |
| 21/05 | Stage 4 | 32 |
| 22/05 | Stage 5 | 32 |
| 23/05 | Stage 6 | 22 |
| 24/05 | Stage 7 | 78 |
| General Classification | 24 | |
| Melbourne - Warrnambool | 26 |
Rider information for 2015
| Rank | 3242 |
| Score | 2 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Avanti Racing Team |
| Date | Race | Rank |
| 10/01 | National Championship Australia | 12 |
| New Zealand Cycle Classic | ||
| 23/01 | Stage 4 | 2 |
| 24/01 | General Classification | 2 |
| 05/03 | Oceania Continental Championships Road Race | 3 |
| Tour of Japan | ||
| 29/05 | Prologue | 77 |
| 30/05 | Stage 2 | 47 |
| 31/05 | Stage 3 | 56 |
| 01/06 | Stage 4 | 31 |
| 02/06 | Stage 5 | 32 |
| 03/06 | Stage 6 | 19 |
| 04/06 | Stage 7 | 19 |
| 05/06 | Stage 8 | 46 |
| General Classification | 14 | |
| 23/08 | G.P. Stad Zottegem | 71 |
| 15/10 | Melbourne - Warrnambool | 8 |
Rider information for 2016
| Rank | 1184 |
| Score | 21 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Avanti Isowhey Sport |
| Date | Race | Rank |
| 08/01 | National Championship Australia | 10 |
| 11/03 | Oceania Continental Championships Road Race | 16 |
Rider information for 2017
| Rank | 5365 |
| Score | 0 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Elite without contract |
| Date | Race | Rank |
| 07/01 | National Championship Australia | 13 |
Rider information for 2018
| Rank | 5570 |
| Score | 0 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Elite without contract |
| Date | Race | Rank |
| 06/01 | National Championship Australia | 7 |
| 16/02 | Melbourne - Warrnambool | 110 |
Rider information for 2019
| Rank | 3346 |
| Score | 3 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Elite without contract |
| Date | Race | Rank |
| 12/01 | National Championship Australia | 14 |
| Jayco Herald Sun Tour | ||
| 05/02 | Stage 1 | 78 |
| 06/02 | Stage 2 | 31 |
| 07/02 | Stage 3 | 44 |
| 08/02 | Stage 4 | 13 |
| 09/02 | Stage 5 | 44 |
| General Classification | 24 | |
| 15/02 | Melbourne - Warrnambool | 3 |
Rider information for 2020
| Rank | 2050 |
| Score | 2 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Elite without contract |
| Date | Race | Rank |
| 07/02 | National Championship Australia | 8 |
| 01/05 | Melbourne - Warrnambool | 57 |
Rider information for 2021
| Rank | 2024 |
| Score | 6 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Elite without contract |
| Date | Race | Rank |
| 16/01 | National Championship Australia | 8 |
| 19/02 | Melbourne - Warrnambool | 24 |
| 10/04 | Oceania Continental Championships Road Race | 18 |
Rider information for 2022
| Rank | 1902 |
| Score | 8 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Elite without contract |
| Date | Race | Rank |
| 08/01 | National Championship Australia | 12 |
Rider information for 2023
| Rank | 6281 |
| Score | 0 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Elite without contract |
| Date | Race | Rank |
| 07/01 | National Championship Australia | 11 |
| 03/02 | Melbourne - Warrnambool Classic | 1 |
Rider information for 2024
| Rank | 1973 |
| Score | 6 |
| Name | Mark O'BRIEN |
| Country | Australia |
| Team | Elite without contract |