| Season | Team | Competition | MP | G | A | Rating | ||
|---|---|---|---|---|---|---|---|---|
| 2024/2025 | Ebbsfleet United | National League | 0 | 0 | 0 | 0 | 0 | – |
| 2023/2024 | Ebbsfleet United | National League | 11 | 0 | 0 | 5 | 0 | – |
| 2022/2023 | Ebbsfleet United | National League N / S | 20 | 0 | 0 | 0 | 0 | – |
| 2021/2022 | Ebbsfleet United | National League N / S | 27 | 1 | 0 | 0 | 0 | – |
| 2020/2021 | Stevenage | League Two | 14 | 0 | 1 | 2 | 0 | 6.9 |
| 2020/2021 | Northampton Town | League One | 6 | 0 | 0 | 2 | 0 | 6.4 |
| 2019/2020 | Northampton Town | League Two | 18 | 0 | 1 | 3 | 0 | 6.9 |
| 2018/2019 | Stevenage | League Two | 5 | 1 | 0 | 1 | 0 | – |
| 2018/2019 | Bristol Rovers | League One | 10 | 1 | 0 | 1 | 0 | – |
| 2017/2018 | Stevenage | League Two | 39 | 2 | 0 | 7 | 0 | – |
| 2016/2017 | Millwall | League One | 23 | 1 | 0 | 7 | 0 | – |
| 2015/2016 | Millwall | League One | 32 | 3 | 0 | 10 | 0 | – |
| 2014/2015 | Gillingham | League One | 25 | 2 | 0 | 6 | 0 | – |
| 2013/2014 | Gillingham | League One | 46 | 2 | 0 | 6 | 0 | – |
| 2013 | Gillingham | Damallsvenskan | 0 | 0 | 0 | 0 | 0 | – |
| 2012/2013 | Gillingham | League Two | 38 | 2 | 0 | 6 | 0 | – |
| 2011/2012 | Gillingham | League Two | 35 | 1 | 0 | 8 | 0 | – |
| 2010/2011 | Gillingham | League Two | 17 | 1 | 0 | 3 | 0 | – |
| 2009/2010 | Blackpool | Championship | 6 | 0 | 0 | 2 | 0 | – |
| 2008/2009 | Blackpool | Championship | 15 | 0 | 0 | 1 | 0 | – |
| 2007/2008 | Blackpool | Championship | 0 | 0 | 0 | 0 | 0 | – |
| Total | 387 | 17 | 2 | 70 | 0 | – | ||
| Date | From | To | Type | |
|---|---|---|---|---|
| 07 Jan 2021 | Stevenage | Ebbsfleet | Free | |
| 07 Jan 2019 | Stevenage | Northampton | Free | |
| 01 Mar 2019 | Bristol Rovers | Stevenage | N/A | |
| - | Stevenage | Bristol Rovers | Loan | |
| - | Millwall | Stevenage | Free | |
| 07 Jan 2015 | Gillingham | Millwall | Free |
J. Martin career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.