| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2012/2013 | League One (England) | 9 | 121 | 0 | 0 | 0 | — |
| 2013/2014 | Enterprise National League (England) | 5 | — | 3 | 0 | — | — |
| 2013/2014 | League Two (England) | 3 | 8 | 0 | 0 | — | — |
| 2014/2015 | Championship (England) | 6 | 1082 | 2 | 1 | 0.25 | — |
| 2015/2016 | League One (England) | 31 | 2618 | 10 | 5 | 0.52 | — |
| 2016/2017 | League One (England) | 46 | 3029 | 13 | 3 | 0.48 | 6.63 |
| 2017/2018 | Championship (England) | 30 | 1797 | 4 | 1 | 0.25 | 6.77 |
| 2018/2019 | Championship (England) | 35 | 1497 | 2 | 1 | 0.18 | 6.75 |
| 2019/2020 | Championship (England) | 18 | 659 | 3 | 0 | 0.41 | 6.8 |
| 2020/2021 | League One (England) | 33 | 1904 | 4 | 1 | 0.24 | 6.89 |
| 2021/2022 | League One (England) | 17 | 768 | 5 | 1 | 0.7 | 6.89 |
| 2022/2023 | League One (England) | 6 | 47 | 0 | 0 | — | 6.6 |
| 2022/2023 | League Two (England) | 14 | 774 | 2 | 0 | 0.23 | 6.87 |
| 2023/2024 | League One (England) | 12 | 409 | 0 | 0 | 0 | 6.81 |
| 2023/2024 | League Two (England) | 23 | 1493 | 1 | 5 | 0.36 | 6.94 |
| 2024 | Premier Division | 8 | 459 | 1 | 0 | 0.2 | 6.75 |
| 2024/2025 | Enterprise National League (England) | 7 | 523 | 3 | 0 | 0.52 | 6.81 |
| 2025/2026 | Enterprise National League (England) | 24 | 1375 | 4 | 3 | 0.46 | 6.55 |
Domestic league competitions only (SportMonks sub_type='domestic'); national-team, continental and cup competitions are excluded. Classification resolved by league id against the canonical leagues index. G+A/90 computed from minutes actually played.
Figures computed from the GioScore season-stats database · as of 2026-07-26
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Wigan Athletic | 11 | 5 | 3 | 3 | 1 | 0 | 0 | 0 |
 Sheffield United | 10 | 5 | 2 | 3 | 2 | 0 | 1 | 0 |
 Bradford City | 10 | 3 | 5 | 2 | 0 | 0 | 1 | 0 |
 Charlton Athletic | 9 | 3 | 3 | 3 | 1 | 0 | 0 | 0 |
 Bolton Wanderers | 9 | 1 | 3 | 5 | 1 | 0 | 0 | 0 |
 Barnsley | 9 | 2 | 2 | 5 | 3 | 1 | 0 | 0 |
 Ipswich Town | 9 | 5 | 3 | 1 | 1 | 0 | 0 | 0 |
 Oxford United | 9 | 4 | 2 | 3 | 1 | 0 | 0 | 0 |
 Gillingham | 9 | 5 | 2 | 2 | 2 | 0 | 0 | 0 |
 Fleetwood Town | 9 | 4 | 1 | 4 | 2 | 0 | 0 | 0 |
 Sheffield Wednesday | 8 | 1 | 2 | 5 | 0 | 0 | 0 | 0 |
 Nottingham Forest | 8 | 4 | 2 | 2 | 1 | 0 | 0 | 0 |
 Crewe Alexandra | 8 | 5 | 3 | 0 | 4 | 0 | 0 | 0 |
 Shrewsbury Town | 8 | 4 | 1 | 3 | 2 | 0 | 0 | 0 |
 Rochdale | 8 | 4 | 2 | 2 | 2 | 3 | 1 | 0 |
 AFC Wimbledon | 8 | 5 | 3 | 0 | 1 | 0 | 0 | 0 |
 Milton Keynes Dons | 8 | 3 | 4 | 1 | 0 | 0 | 0 | 0 |
 Hull City | 7 | 1 | 5 | 1 | 1 | 0 | 0 | 0 |
 Reading | 7 | 4 | 0 | 3 | 0 | 0 | 0 | 0 |
 Derby County | 7 | 3 | 3 | 1 | 0 | 0 | 0 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Poland | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 |
Aiden O'Brien's 2025/2026 Enterprise National League (England) season produced 4 goals and 3 assists across 24 appearances (1,375 minutes) — 0.46 goal involvements per 90. Per-match rating over the season: 6.55.
No season rated higher than 2023/2024 (6.94, League Two (England)); none lower than 2025/2026 (6.55).
