| Season | Team | Competition | MP | G | A | Rating | ||
|---|---|---|---|---|---|---|---|---|
| 2025/2026 | Club Tijuana | Liga MX | 9 | 1 | 0 | 0 | 0 | 6.4 |
| 2025 | San Jose Earthquakes | MLS | 30 | 14 | 2 | 0 | 0 | 6.9 |
| 2024 | CF Montreal | MLS | 21 | 12 | 3 | 2 | 0 | 7.1 |
| 2023 | Inter Miami | MLS | 27 | 7 | 1 | 1 | 0 | 6.7 |
| 2022 | Atlanta Utd | MLS | 23 | 8 | 1 | 0 | 0 | 6.8 |
| 2021 | Atlanta Utd | MLS | 25 | 12 | 0 | 0 | 1 | 7.0 |
| 2020 | Atlanta Utd | MLS | 1 | 0 | 0 | 0 | 0 | 6.3 |
| 2019 | Atlanta Utd | MLS | 30 | 27 | 3 | 2 | 0 | 7.4 |
| 2018 | Atlanta Utd | MLS | 39 | 35 | 6 | 2 | 0 | 7.4 |
| 2017 | Atlanta Utd | MLS | 21 | 19 | 1 | 4 | 0 | 7.3 |
| 2016/2017 | Torino | Serie A | 11 | 1 | 0 | 3 | 0 | 6.8 |
| 2015/2016 | Torino | Serie A | 21 | 3 | 1 | 0 | 0 | 6.9 |
| 2014/2015 | Torino | Serie A | 26 | 3 | 0 | 0 | 0 | – |
| 2013/2014 | Young Boys | Super League | 18 | 2 | 0 | 2 | 0 | – |
| 2013/2014 | Thun | Super League | 18 | 8 | 0 | 1 | 0 | – |
| 2012/2013 | Young Boys | Super League | 8 | 1 | 0 | 0 | 0 | – |
| 2011/2012 | Young Boys | Super League | 10 | 0 | 0 | 1 | 0 | – |
| Total | 338 | 153 | 18 | 18 | 1 | – | ||
| Date | From | To | Type | |
|---|---|---|---|---|
| 01 Jul 2026 | San Jose Earthquakes | Club Tijuana | Free agent | |
| - | CF Montreal | San Jose Earthquakes | Free agent | |
| 02 Jun 2024 | Inter Miami | CF Montreal | Free agent | |
| - | Atlanta Utd | Inter Miami | Free agent | |
| - | Torino | Atlanta Utd | Transfer | |
| - | Atlanta Utd | Torino | Return from loan | |
| 02 Feb 2017 | Torino | Atlanta Utd | Loan | |
| 07 Jan 2014 | Young Boys | Torino | Transfer | |
| - | Thun | Young Boys | Return from loan | |
| 07 Jan 2013 | Young Boys | Thun | Loan | |
| 01 Jan 2012 | Caracas | Young Boys | Transfer |
J. Martinez career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.