| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2016/2017 | Liga Nacional | 6 | 41 | 1 | 0 | — | — |
| 2017/2018 | Liga Nacional | 27 | 1053 | 6 | 0 | 0.51 | — |
| 2018/2019 | Liga Nacional | 16 | 1103 | 10 | 0 | 0.82 | — |
| 2019/2020 | Liga Nacional | 15 | 737 | 2 | 0 | 0.24 | — |
| 2020/2021 | Liga Nacional | 37 | 2519 | 11 | 0 | 0.39 | — |
| 2020 | Concacaf League | 1 | 6 | 0 | 0 | — | — |
| 2021/2022 | Liga Nacional | 40 | 2752 | 17 | 0 | 0.56 | — |
| 2022 | Concacaf League | 4 | 327 | 1 | 1 | 0.55 | — |
| 2022/2023 | Liga Nacional | 42 | 1863 | 10 | 0 | 0.48 | — |
| 2023/2024 | Liga Nacional | 21 | 1241 | 17 | 0 | 1.23 | — |
| 2024/2025 | Liga Nacional | 24 | 1935 | 13 | 1 | 0.65 | 7.08 |
| 2025/2026 | Liga Nacional | 39 | 2873 | 15 | 2 | 0.53 | 6.79 |
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 2026-07-22
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Comunicaciones | 9 | 2 | 4 | 3 | 2 | 0 | 4 | 0 |
 Antigua GFC | 7 | 3 | 1 | 3 | 2 | 0 | 1 | 0 |
 Mictlán | 5 | 3 | 1 | 1 | 1 | 0 | 2 | 0 |
 Malacateco | 5 | 4 | 0 | 1 | 5 | 0 | 0 | 0 |
 Guastatoya | 5 | 3 | 1 | 1 | 1 | 0 | 0 | 0 |
 Iztapa | 5 | 3 | 1 | 1 | 2 | 0 | 1 | 0 |
 Achuapa | 5 | 3 | 2 | 0 | 1 | 0 | 0 | 1 |
 Xelajú | 4 | 3 | 1 | 0 | 0 | 0 | 0 | 0 |
 Marquense | 4 | 3 | 1 | 0 | 4 | 1 | 0 | 0 |
 Mixco | 4 | 2 | 1 | 1 | 2 | 0 | 1 | 0 |
 Cobán Imperial | 3 | 2 | 0 | 1 | 1 | 0 | 1 | 0 |
 Suchitepéquez | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Xinabajul | 2 | 2 | 0 | 0 | 1 | 0 | 0 | 0 |
 Aurora | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Deportivo Sanarate | 2 | 1 | 0 | 1 | 1 | 0 | 0 | 0 |
 Santa Lucia | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Solola | 2 | 2 | 0 | 0 | 2 | 0 | 1 | 0 |
 Deportivo Saprissa | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Olimpia | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Nueva Concepción | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Argentina | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Uruguay | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Ecuador | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Mexico | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Costa Rica | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Guatemala | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Iceland | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 |
 Jamaica | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Haiti | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Guyana | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Dominica | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 |
 Martinique | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 |
 Curacao | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 British Virgin Islands | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Nicaragua | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 England U20 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 France U18 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Brazil U22 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Qatar U22 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
J. Martínez's 2025/2026 Liga Nacional season produced 15 goals and 2 assists across 39 appearances (2,873 minutes) — 0.53 goal involvements per 90. That season graded out at an average match rating of 6.79.
No season rated higher than 2024/2025 (7.08, Liga Nacional); none lower than 2025/2026 (6.79).
