| Name | Brandon O`Neill |
| Date of birth | 12/04/1994 |
| Nationality | Australian |
| Position | Defensive midfielder, Defender |
| More info | http://en.wikipedia.org/wiki/Brandon_O%27Neill |
| Team | Appearances | Goals | Yellow cards | Red cards |
| Perth Glory | 19 | 0 | 2 | 0 |
| Sydney FC | 144 | 10 | 33 | 0 |
| Match Type | Appearances | Goals | Yellow cards | Red cards |
| Asian Champions League | 17 | 2 | 3 | 0 |
| A-League Finals | 4 | 0 | 0 | 0 |
| A-League Grand Final | 2 | 0 | 0 | 0 |
| FFA Cup | 19 | 0 | 8 | 0 |
| League | 121 | 8 | 24 | 0 |
| # | Player | Appearances on the same team | Team(s) |
| 1. | Milos Ninkovic | 133 | Sydney FC |
| 2. | Alex Brosque | 107 | Sydney FC |
| Alex Wilkinson | 107 | Sydney FC | |
| 4. | Joshua Brillante | 100 | Sydney FC |
| 5. | Michael Zullo | 94 | Sydney FC |
| 6. | Rhyan Grant | 92 | Sydney FC |
| 7. | Andrew Redmayne | 82 | Sydney FC |
| 8. | Matt Simon | 79 | Sydney FC |
| 9. | David Carney | 69 | Sydney FC |
| 10. | Bobo | 67 | Sydney FC |
| Team | Date | Match Type | Result | Goals | Bookings | On | Off | Notes |
| Perth Glory | 18/03/2012 | League | Gold Coast United 3-0 Perth Glory |  | 78' | Full time | ||
| 24/03/2012 | League | Perth Glory 4-2 Melbourne Victory | Kick off | 76' | ||||
| 1/04/2012 | A-League Finals | Perth Glory 3-0 Melbourne Heart | 90' | Full time | ||||
| 30/11/2012 | League | Melbourne Victory 1-0 Perth Glory | 65' | Full time | ||||
| 11/01/2013 | League | Adelaide United 3-2 Perth Glory | 74' | Full time | ||||
| 26/01/2013 | League | Perth Glory 0-1 Brisbane Roar | 79' | Full time | ||||
| 13/10/2013 | League | Adelaide United 3-1 Perth Glory | Kick off | Full time | ||||
| 20/10/2013 | League | Newcastle Jets 0-0 Perth Glory | Kick off | Full time | ||||
| 9/11/2013 | League | Wellington Phoenix 1-1 Perth Glory | 82' | Full time | ||||
| 22/12/2013 | League | Perth Glory 0-0 Adelaide United | 59' | Full time | ||||
| 4/01/2014 | League | Newcastle Jets 0-1 Perth Glory | | 68' | Full time | |||
| 28/02/2014 | League | Brisbane Roar 3-1 Perth Glory | Kick off | Full time | ||||
| 9/03/2014 | League | Wellington Phoenix 1-1 Perth Glory | 45' | Full time | ||||
| 30/03/2014 | League | Perth Glory 2-1 Newcastle Jets | 45' | Full time | ||||
| 5/08/2014 | FFA Cup | Newcastle Jets 0-2 Perth Glory | 87' | Full time | ||||
| 26/10/2014 | League | Adelaide United 2-0 Perth Glory | 73' | Full time | ||||
| 11/11/2014 | FFA Cup | Bentleigh Greens (VIC) 0-3 Perth Glory | 83' | Full time | ||||
| 20/12/2014 | League | Perth Glory 4-1 Central Coast Mariners | 80' | Full time | ||||
| 7/02/2015 | League | Perth Glory 1-3 Sydney FC | 77' | Full time | ||||
| Sydney FC | 5/08/2015 | FFA Cup | Sorrento FC (WA) 0-2 Sydney FC | Kick off | Full time | |||
| 26/08/2015 | FFA Cup | Adelaide United 2-1 Sydney FC after extra time | | Kick off | Full time | |||
| 10/10/2015 | League | Sydney FC 1-1 Melbourne City FC | Kick off | Full time | ||||
| 17/10/2015 | League | Newcastle Jets 0-1 Sydney FC | Kick off | Full time | ||||
| 24/10/2015 | League | Sydney FC 1-0 Western Sydney Wanderers | Kick off | Full time | ||||
| 31/10/2015 | League | Central Coast Mariners 1-3 Sydney FC | | Kick off | 58' | |||
| 6/11/2015 | League | Sydney FC 0-0 Brisbane Roar | Kick off | Full time | ||||
| 14/11/2015 | League | Sydney FC 2-4 Melbourne Victory | 85' | Full time | ||||
| 21/11/2015 | League | Perth Glory 0-0 Sydney FC | 81' | Full time | ||||
| 26/11/2015 | League | Sydney FC 0-0 Wellington Phoenix | | 58' | Full time | |||
| 11/12/2015 | League | Adelaide United 2-1 Sydney FC | | 73' | Full time | |||
| 19/12/2015 | League | Wellington Phoenix 1-1 Sydney FC | Kick off | Full time | ||||
| 26/12/2015 | League | Sydney FC 4-1 Central Coast Mariners | Kick off | Full time | ||||
| 2/01/2016 | League | Melbourne City FC 2-2 Sydney FC | Kick off | 74' | ||||
| 30/01/2016 | League | Sydney FC 1-3 Brisbane Roar | Kick off | 70' | ||||
| 20/02/2016 | League | Sydney FC 1-1 Western Sydney Wanderers | Kick off | Full time | ||||
| 27/02/2016 | League | Melbourne Victory 1-1 Sydney FC | Kick off | Full time | ||||
| 2/03/2016 | Asian Champions League | Sydney FC 2-1 Guangzhou Evergrande | Kick off | Full time | ||||
| 5/03/2016 | League | Melbourne City FC 3-0 Sydney FC | Kick off | 74' | ||||
| 12/03/2016 | League | Sydney FC 1-3 Wellington Phoenix | Kick off | Full time | ||||
| 16/03/2016 | Asian Champions League | Pohang Steelers 0-1 Sydney FC | 59' | Full time | ||||
| 19/03/2016 | League | Central Coast Mariners 2-2 Sydney FC | Kick off | Full time | ||||
| 26/03/2016 | League | Brisbane Roar 3-2 Sydney FC | | Kick off | Full time | |||
| 2/04/2016 | League | Sydney FC 0-2 Adelaide United | 45' | Full time | ||||
| 5/04/2016 | Asian Champions League | Sydney FC 1-0 Pohang Steelers | Kick off | Full time | ||||
| 10/04/2016 | League | Sydney FC 4-0 Perth Glory | Kick off | Full time | ||||
| 20/04/2016 | Asian Champions League | Sydney FC 0-0 Urawa Red Diamonds | Kick off | Full time | ||||
| 3/05/2016 | Asian Champions League | Guangzhou Evergrande 1-0 Sydney FC | Kick off | Full time | ||||
| 18/05/2016 | Asian Champions League | Shandong Luneng Taishan 1-1 Sydney FC | Kick off | Full time | ||||
| 25/05/2016 | Asian Champions League | Sydney FC 2-2 Shandong Luneng Taishan |  | | Kick off | Full time | ||
| 10/08/2016 | FFA Cup | Wollongong Wolves (NSW) 0-3 Sydney FC | Kick off | Full time | ||||
| 30/08/2016 | FFA Cup | Perth Glory 0-2 Sydney FC after extra time | | Kick off | Full time | |||
| 21/09/2016 | FFA Cup | Blacktown City (NSW) 0-3 Sydney FC | Kick off | Full time | ||||
| 8/10/2016 | League | Western Sydney Wanderers 0-4 Sydney FC | | Kick off | Full time | |||
| 15/10/2016 | League | Sydney FC 4-0 Central Coast Mariners | | Kick off | Full time | |||
| 19/10/2016 | FFA Cup | Canberra Olympic (ACT) 0-3 Sydney FC | | Kick off | 46' | |||
| 23/10/2016 | League | Wellington Phoenix 0-1 Sydney FC | | Kick off | Full time | |||
| 29/10/2016 | League | Newcastle Jets 0-2 Sydney FC | Kick off | Full time | ||||
| 5/11/2016 | League | Sydney FC 2-1 Melbourne Victory | Kick off | Full time | ||||
| 13/11/2016 | League | Sydney FC 4-1 Perth Glory | Kick off | Full time | ||||
| 19/11/2016 | League | Brisbane Roar 1-1 Sydney FC | Kick off | Full time | ||||
| 26/11/2016 | League | Sydney FC 0-0 Adelaide United | Kick off | 81' | ||||
| 30/11/2016 | FFA Cup | Melbourne City FC 1-0 Sydney FC | | Kick off | 72' | |||
| 4/12/2016 | League | Newcastle Jets 0-2 Sydney FC | 84' | Full time | ||||
| 9/12/2016 | League | Sydney FC 1-1 Melbourne City FC | 78' | Full time | ||||
| 17/12/2016 | League | Perth Glory 1-4 Sydney FC | Kick off | Full time | ||||
| 26/12/2016 | League | Adelaide United 0-4 Sydney FC | | 74' | Full time | 50th appearance in the A-League | ||
| 30/12/2016 | League | Sydney FC 2-0 Brisbane Roar | Kick off | Full time | ||||
| 8/01/2017 | League | Central Coast Mariners 2-3 Sydney FC | Kick off | Full time | ||||
| 14/01/2017 | League | Sydney FC 0-0 Western Sydney Wanderers | Kick off | Full time | 50th appearance for Sydney FC | |||
| 20/01/2017 | League | Sydney FC 2-0 Adelaide United | Kick off | Full time | ||||
| 26/01/2017 | League | Melbourne Victory 1-2 Sydney FC | | Kick off | Full time | |||
| 3/02/2017 | League | Brisbane Roar 0-0 Sydney FC | | Kick off | Full time | |||
| 18/02/2017 | League | Western Sydney Wanderers 1-0 Sydney FC | Kick off | 85' | ||||
| 24/02/2017 | League | Melbourne City FC 1-3 Sydney FC | | Kick off | Full time | |||
| 3/03/2017 | League | Sydney FC 1-0 Melbourne Victory | Kick off | Full time | ||||
| 10/03/2017 | League | Sydney FC 1-0 Central Coast Mariners | Kick off | Full time | ||||
| 26/03/2017 | League | Perth Glory 0-3 Sydney FC | | | Kick off | Full time | ||
| 1/04/2017 | League | Sydney FC 3-0 Melbourne City FC | | Kick off | Full time | |||
| 15/04/2017 | League | Sydney FC 2-0 Newcastle Jets | Kick off | Full time | ||||
| 29/04/2017 | A-League Finals | Sydney FC 3-0 Perth Glory | Kick off | Full time | ||||
| 7/05/2017 | A-League Grand Final | Sydney FC 1-1 Melbourne Victory (Penalties: 4-2) | Kick off | Full time | Scored in the penalty shoot out | |||
| 29/08/2017 | FFA Cup | Bankstown Berries FC (NSW) 0-3 Sydney FC | | Kick off | 67' | |||
| 13/09/2017 | FFA Cup | Sydney FC 2-0 Melbourne City FC | Kick off | Full time | ||||
| 7/10/2017 | League | Melbourne Victory 0-1 Sydney FC | Kick off | Full time | ||||
| 11/10/2017 | FFA Cup | South Melbourne (VIC) 1-5 Sydney FC | | Kick off | Full time | |||
| 15/10/2017 | League | Sydney FC 3-2 Wellington Phoenix | Kick off | Full time | ||||
| 21/10/2017 | League | Sydney FC 2-2 Western Sydney Wanderers | Kick off | Full time | ||||
| 27/10/2017 | League | Sydney FC 2-0 Perth Glory | Kick off | Full time | ||||
| 3/11/2017 | League | Melbourne City FC 0-1 Sydney FC | Kick off | Full time | ||||
| 10/11/2017 | League | Central Coast Mariners 2-0 Sydney FC | Kick off | Full time | ||||
| 18/11/2017 | League | Sydney FC 2-1 Newcastle Jets | Kick off | Full time | ||||
| 21/11/2017 | FFA Cup | Sydney FC 2-1 Adelaide United after extra time | Kick off | Full time | ||||
| 25/11/2017 | League | Sydney FC 3-1 Brisbane Roar | | Kick off | Full time | |||
| 1/12/2017 | League | Adelaide United 0-1 Sydney FC | | Kick off | Full time | |||
| 9/12/2017 | League | Western Sydney Wanderers 0-5 Sydney FC | | Kick off | Full time | |||
| 15/12/2017 | League | Sydney FC 3-1 Melbourne City FC | | Kick off | Full time | |||
| 23/12/2017 | League | Wellington Phoenix 1-4 Sydney FC | Kick off | Full time | ||||
| 30/12/2017 | League | Sydney FC 6-0 Perth Glory | | Kick off | Full time | |||
| 3/01/2018 | League | Sydney FC 2-2 Newcastle Jets | Kick off | 83' | ||||
| 8/01/2018 | League | Brisbane Roar 0-3 Sydney FC | | Kick off | Full time | |||
| 14/01/2018 | League | Adelaide United 0-0 Sydney FC | Kick off | Full time | ||||
| 20/01/2018 | League | Sydney FC 1-1 Central Coast Mariners | Kick off | Full time | ||||
| 26/01/2018 | League | Melbourne Victory 1-3 Sydney FC | | Kick off | 89' | |||
| 10/02/2018 | League | Melbourne City FC 0-4 Sydney FC | Kick off | Full time | ||||
| 16/02/2018 | Asian Champions League | Sydney FC 0-2 Suwon Samsung Bluewings | | Kick off | Full time | |||
| 21/02/2018 | Asian Champions League | Shanghai Shenhua 2-2 Sydney FC | Kick off | Full time | ||||
| 25/02/2018 | League | Sydney FC 3-1 Western Sydney Wanderers | Kick off | Full time | ||||
| 3/03/2018 | League | Newcastle Jets 2-1 Sydney FC | | Kick off | 69' | |||
| 7/03/2018 | Asian Champions League | Sydney FC 0-2 Kashima Antlers | | Kick off | Full time | |||
| 17/03/2018 | League | Sydney FC 1-2 Brisbane Roar | Kick off | Full time | ||||
| 24/03/2018 | League | Central Coast Mariners 1-2 Sydney FC | Kick off | Full time | ||||
| 29/03/2018 | League | Perth Glory 2-3 Sydney FC | Kick off | Full time | ||||
| 3/04/2018 | Asian Champions League | Suwon Samsung Bluewings 1-4 Sydney FC | Kick off | Full time | ||||
| 8/04/2018 | League | Sydney FC 3-0 Adelaide United | Kick off | Full time | ||||
| 13/04/2018 | League | Sydney FC 1-0 Melbourne Victory | Kick off | Full time | ||||
| 17/04/2018 | Asian Champions League | Sydney FC 0-0 Shanghai Shenhua | Kick off | Full time | ||||
| 28/04/2018 | A-League Finals | Sydney FC 2-3 Melbourne Victory after extra time | Kick off | Full time | ||||
| 1/08/2018 | FFA Cup | Rockdale City Suns (NSW) 2-4 Sydney FC | Kick off | Full time | ||||
| 21/08/2018 | FFA Cup | Cairns FC (QLD) 1-2 Sydney FC | Kick off | Full time | 100th appearance for Sydney FC | |||
| 19/09/2018 | FFA Cup | Avondale (VIC) 2-4 Sydney FC after extra time | Kick off | Full time | ||||
| 6/10/2018 | FFA Cup | Western Sydney Wanderers 0-3 Sydney FC | | Kick off | Full time | |||
| 19/10/2018 | League | Adelaide United 1-1 Sydney FC | Kick off | Full time | ||||
| 27/10/2018 | League | Sydney FC 2-0 Western Sydney Wanderers | Kick off | Full time | ||||
| 30/10/2018 | FFA Cup | Adelaide United 2-1 Sydney FC | | Kick off | Full time | |||
| 2/11/2018 | League | Melbourne City FC 0-3 Sydney FC | | Kick off | Full time | |||
| 10/11/2018 | League | Newcastle Jets 1-1 Sydney FC | Kick off | Full time | ||||
| 25/11/2018 | League | Sydney FC 1-2 Melbourne Victory | Kick off | Full time | ||||
| 1/12/2018 | League | Central Coast Mariners 1-2 Sydney FC | | Kick off | Full time | |||
| 8/12/2018 | League | Sydney FC 1-3 Wellington Phoenix | Kick off | 65' | ||||
| 15/12/2018 | League | Western Sydney Wanderers 1-3 Sydney FC | Kick off | Full time | 100th appearance in the A-League | |||
| 21/12/2018 | League | Perth Glory 1-2 Sydney FC | Kick off | Full time | ||||
| 29/12/2018 | League | Sydney FC 2-1 Brisbane Roar | Kick off | Full time | ||||
| 4/01/2019 | League | Sydney FC 5-2 Central Coast Mariners | Kick off | Full time | ||||
| 9/01/2019 | League | Perth Glory 3-1 Sydney FC | Kick off | Full time | ||||
| 13/01/2019 | League | Sydney FC 2-1 Adelaide United | Kick off | Full time | ||||
| 19/01/2019 | League | Sydney FC 1-0 Newcastle Jets | Kick off | Full time | ||||
| 23/01/2019 | League | Wellington Phoenix 0-1 Sydney FC | | Kick off | Full time | |||
| 26/01/2019 | League | Melbourne Victory 2-1 Sydney FC | Kick off | Full time | ||||
| 3/02/2019 | League | Sydney FC 2-0 Melbourne City FC | Kick off | Full time | ||||
| 8/02/2019 | League | Brisbane Roar 2-1 Sydney FC | | Kick off | Full time | |||
| 17/02/2019 | League | Sydney FC 1-1 Central Coast Mariners | Kick off | 89' | ||||
| 23/02/2019 | League | Wellington Phoenix 0-1 Sydney FC | Kick off | Full time | ||||
| 1/03/2019 | League | Sydney FC 2-0 Adelaide United | Kick off | Full time | ||||
| 6/03/2019 | Asian Champions League | Sydney FC 0-0 Ulsan Hyundai | Kick off | Full time | ||||
| 13/03/2019 | Asian Champions League | Kawasaki Frontale 1-0 Sydney FC | Kick off | Full time | ||||
| 17/03/2019 | League | Sydney FC 0-2 Melbourne City FC | Kick off | Full time | ||||
| 29/03/2019 | League | Brisbane Roar 1-3 Sydney FC | Kick off | Full time | ||||
| 6/04/2019 | League | Sydney FC 2-1 Melbourne Victory | | Kick off | Full time | |||
| 10/04/2019 | Asian Champions League | Sydney FC 3-3 Shanghai SIPG | Kick off | Full time | ||||
| 13/04/2019 | League | Western Sydney Wanderers 1-1 Sydney FC | | Kick off | 82' | |||
| 18/04/2019 | League | Sydney FC 1-0 Perth Glory | Kick off | Full time | ||||
| 23/04/2019 | Asian Champions League | Shanghai SIPG 2-2 Sydney FC | | Kick off | Full time | |||
| 27/04/2019 | League | Newcastle Jets 2-0 Sydney FC | Kick off | Full time | ||||
| 7/05/2019 | Asian Champions League | Ulsan Hyundai 1-0 Sydney FC | Kick off | Full time | ||||
| 12/05/2019 | A-League Finals | Sydney FC 6-1 Melbourne Victory | Kick off | Full time | ||||
| 19/05/2019 | A-League Grand Final | Perth Glory 0-0 Sydney FC (Penalties: 1-4) | Kick off | Full time | Scored in the penalty shoot out | |||
| 7/08/2019 | FFA Cup | Sydney FC 0-2 Brisbane Roar | Kick off | Full time | ||||
| 11/10/2019 | League | Adelaide United 2-3 Sydney FC | Kick off | Full time | ||||
| 20/10/2019 | League | Sydney FC 2-1 Wellington Phoenix | | | Kick off | Full time | 10th goal for Sydney FC | |
| 26/10/2019 | League | Western Sydney Wanderers 1-0 Sydney FC | Kick off | 80' | ||||
| 1/11/2019 | League | Sydney FC 4-1 Newcastle Jets | Kick off | Full time | ||||
| 17/11/2019 | League | Sydney FC 2-1 Melbourne Victory | Kick off | Full time | ||||
| 23/11/2019 | League | Perth Glory 1-3 Sydney FC | Kick off | Full time |