| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2025/2026 | 2. Liga | 9 | 660 | 1 | 2 | 0.41 | 6.95 |
| 2026/2027 | 1. Liga | 7 | 505 | 0 | 0 | 0 | 6.37 |
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 2026-09-11
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Miedź Legnica | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Arka Gdynia | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
 Podbeskidzie | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Polonia Warszawa | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Zagłębie Sosnowiec | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Stal Rzeszów | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Stal Mielec | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Puszcza Niepołomice | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Resovia Rzeszów | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Hutnik Krakow | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 NKP Podhale | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 |
 ŁKS Łódź II | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
Jan Mierzwa went through 7 1. Liga appearances in 2026/2027 (505 minutes) without a goal or an assist. That season graded out at an average match rating of 6.37.
His league record spans 2 seasons (2025–2026), all with a single club. At his best he averaged 6.95 in 2025/2026, 2. Liga; at his worst, 6.37 in 2026/2027.
