| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2010/2011 | Ekstraklasa | 1 | 90 | 0 | 0 | 0 | — |
| 2011/2012 | Ekstraklasa | 4 | 316 | 0 | 0 | 0 | — |
| 2012/2013 | Ekstraklasa | 23 | 2070 | 0 | 0 | 0 | — |
| 2013/2014 | Ekstraklasa | 16 | 1518 | 0 | 0 | 0 | — |
| 2014/2015 | Ekstraklasa | 3 | 152 | 0 | 0 | 0 | — |
| 2015/2016 | Ekstraklasa | 17 | 1512 | 0 | 0 | 0 | — |
| 2016/2017 | Ekstraklasa | 20 | 1800 | 0 | 0 | 0 | — |
| 2017/2018 | Ekstraklasa | 20 | 1800 | 0 | 0 | 0 | — |
| 2018/2019 | Ekstraklasa | 35 | 3150 | 0 | 0 | 0 | — |
| 2019 | J1 League | 15 | 1350 | 0 | 0 | 0 | 7.06 |
| 2020 | J1 League | 27 | 2430 | 0 | 0 | 0 | 6.92 |
| 2021 | J1 League | 37 | 3330 | 0 | 0 | 0 | 6.87 |
| 2022 | J1 League | 33 | 2970 | 0 | 0 | 0 | 6.92 |
| 2023 | J1 League | 24 | 2160 | 0 | 0 | 0 | 6.93 |
| 2023/2024 | Super Lig | 14 | 1260 | 0 | 0 | 0 | 7.05 |
| 2024/2025 | Super Lig | 23 | 2070 | 0 | 0 | 0 | 7.2 |
| 2025 | J1 League | 12 | 1080 | 0 | 0 | 0 | 6.7 |
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.
Cohort: 18 J1 League goalkeepers, 2025, min. 450 minutes. Computed by ranking the full league corpus, not taken from any feed.
Figures computed from the GioScore season-stats database · as of 2026-08-06
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Galatasaray | 4 | 0 | 0 | 4 | 0 | 0 | 0 | 0 |
 Shonan Bellmare | 4 | 1 | 1 | 2 | 0 | 0 | 1 | 0 |
 Shimizu S-Pulse | 4 | 0 | 0 | 4 | 0 | 0 | 0 | 0 |
 Sivasspor | 3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
 Beşiktaş | 3 | 0 | 0 | 3 | 0 | 0 | 0 | 0 |
 Kayserispor | 3 | 0 | 2 | 1 | 0 | 0 | 0 | 0 |
 Adana Demirspor | 3 | 2 | 1 | 0 | 0 | 0 | 1 | 0 |
 Rizespor | 3 | 1 | 2 | 0 | 0 | 0 | 0 | 0 |
 Kasımpaşa | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 0 |
 Samsunspor | 3 | 2 | 0 | 1 | 0 | 0 | 1 | 0 |
 Avispa Fukuoka | 3 | 0 | 1 | 2 | 0 | 0 | 0 | 0 |
 Kashima Antlers | 3 | 0 | 0 | 3 | 0 | 0 | 0 | 0 |
 Hatayspor | 3 | 2 | 1 | 0 | 0 | 0 | 1 | 0 |
 Gamba Osaka | 3 | 1 | 0 | 2 | 0 | 0 | 1 | 0 |
 Antalyaspor | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Fenerbahçe | 2 | 0 | 1 | 1 | 0 | 0 | 1 | 0 |
 Kashiwa Reysol | 2 | 0 | 1 | 1 | 0 | 0 | 1 | 0 |
 Sagan Tosu | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Trabzonspor | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Tokyo Verdy | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 |
J. Słowik logged 23 appearances (2,070 minutes) in the 2024/2025 Super Lig. His average match rating for that season computes to 7.2. Within a cohort of 18 J1 League goalkeepers with a minimum of 450 minutes in 2025, he places in the 39th percentile by match rating, with a goals rank of 1st of 18.
He is at his recorded peak: 2024/2025's 7.2 tops every previous season, with 2025 (6.7) the low mark.
