| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2013/2014 | First Division (Denmark) | 2 | — | 0 | 0 | — | — |
| 2014/2015 | Superliga (Denmark) | 29 | 2155 | 0 | 0 | 0 | — |
| 2015/2016 | First Division (Denmark) | 23 | 1841 | 1 | 0 | 0.05 | — |
| 2016/2017 | Superliga (Denmark) | 33 | 2970 | 2 | 1 | 0.09 | — |
| 2017/2018 | Superliga (Denmark) | 32 | 2818 | 6 | 2 | 0.26 | — |
| 2017/2018 | First Division (Denmark) | 15 | 1350 | 3 | 0 | 0.2 | — |
| 2018/2019 | Superliga (Denmark) | 17 | 1277 | 1 | 1 | 0.14 | — |
| 2019/2020 | Superliga (Denmark) | 16 | 1241 | 0 | 0 | 0 | 6.8 |
| 2020/2021 | Superliga (Denmark) | 26 | 1661 | 4 | 0 | 0.22 | 6.71 |
| 2021/2022 | Superliga (Denmark) | 7 | 281 | 0 | 1 | 0.32 | 6.77 |
| 2022/2023 | Superliga (Denmark) | 10 | 562 | 1 | 0 | 0.16 | 7.01 |
| 2022/2023 | Ekstraklasa | 6 | 379 | 0 | 1 | 0.24 | 6.85 |
| 2023 | Eliteserien | 24 | 2041 | 2 | 1 | 0.13 | 7.1 |
| 2023/2024 | Superliga (Denmark) | 14 | 235 | 0 | 0 | 0 | 6.67 |
| 2024/2025 | Superliga (Denmark) | 19 | 1129 | 2 | 2 | 0.32 | 6.92 |
| 2025/2026 | Superliga (Denmark) | 32 | 2880 | 5 | 1 | 0.19 | 6.66 |
| 2026/2027 | Superliga (Denmark) | 2 | 180 | 0 | 0 | 0 | 7 |
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 2026-08-03
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 FC København | 24 | 2 | 7 | 15 | 1 | 0 | 4 | 0 |
 Odense BK | 24 | 9 | 8 | 7 | 2 | 0 | 1 | 0 |
 Aalborg BK | 22 | 7 | 6 | 9 | 5 | 0 | 4 | 0 |
 Nordsjælland | 22 | 5 | 6 | 11 | 1 | 0 | 1 | 0 |
 FC Midtjylland | 21 | 5 | 3 | 13 | 1 | 0 | 1 | 0 |
 Randers FC | 21 | 11 | 5 | 5 | 0 | 1 | 1 | 0 |
 AGF | 21 | 4 | 7 | 10 | 0 | 0 | 2 | 0 |
 Sønderjyske Fodbold | 19 | 7 | 3 | 9 | 3 | 0 | 1 | 0 |
 Brøndby IF | 18 | 1 | 4 | 13 | 2 | 0 | 0 | 1 |
 Vejle Boldklub | 14 | 3 | 8 | 3 | 1 | 0 | 1 | 0 |
 Horsens | 12 | 5 | 3 | 4 | 1 | 0 | 1 | 0 |
 Viborg FF | 12 | 3 | 3 | 6 | 1 | 1 | 2 | 0 |
 Hobro | 10 | 3 | 4 | 3 | 1 | 0 | 2 | 0 |
 Lyngby Boldklub | 10 | 2 | 4 | 4 | 1 | 0 | 0 | 0 |
 Esbjerg | 8 | 1 | 2 | 5 | 0 | 0 | 2 | 1 |
 Fredericia | 4 | 0 | 1 | 3 | 1 | 0 | 0 | 0 |
 FC Helsingør | 4 | 1 | 1 | 2 | 0 | 0 | 1 | 0 |
 Molde | 3 | 1 | 0 | 2 | 0 | 0 | 0 | 0 |
 Salzburg | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Rangers | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
Jens Martin Gammelby closed the 2025/2026 Superliga (Denmark) campaign on 5 goals and 1 assist from 32 outings (2,880 minutes) — 0.19 goal involvements per 90. His average match rating for that season computes to 6.66.
2023 stands as his highest-rated season (7.1, Eliteserien), with 2025/2026 the weakest (6.66).
