| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2013 | K League 1 | 3 | 90 | 0 | 0 | 0 | — |
| 2014 | K League 1 | 1 | 90 | 0 | 0 | 0 | — |
| 2015 | K League 1 | 24 | 1350 | 0 | 0 | 0 | — |
| 2016 | K League 1 | 29 | — | 1 | 0 | — | — |
| 2017 | K League 1 | 29 | 2525 | 0 | 1 | 0.04 | — |
| 2018 | K League 1 | 22 | 1664 | 0 | 0 | 0 | — |
| 2019 | K League 1 | 30 | 2659 | 1 | 0 | 0.03 | — |
| 2020 | K League 1 | 2 | 91 | 0 | 0 | 0 | 6.53 |
| 2021 | K League 1 | 17 | 1131 | 0 | 0 | 0 | 6.83 |
| 2022 | K League 1 | 15 | 658 | 1 | 0 | 0.14 | 6.82 |
| 2023 | K League 1 | 23 | 1787 | 0 | 0 | 0 | 7 |
| 2024 | K League 1 | 13 | 890 | 0 | 0 | 0 | 7.04 |
| 2025 | K League 2 | 7 | 543 | 0 | 0 | 0 | 6.74 |
| 2025/2026 | Premier League | 5 | 406 | 1 | 0 | 0.22 | — |
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: 33 K League 2 defenders, 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 2026-07-21
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Ulsan HD | 4 | 0 | 1 | 3 | 0 | 0 | 0 | 0 |
 Seoul | 3 | 0 | 1 | 2 | 0 | 0 | 0 | 0 |
 Suwon | 3 | 0 | 1 | 2 | 0 | 0 | 0 | 0 |
 Incheon United | 3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
 Daegu | 3 | 2 | 0 | 1 | 0 | 0 | 0 | 0 |
 Gamba Osaka | 3 | 2 | 0 | 1 | 0 | 0 | 0 | 0 |
 Sydney | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Urawa Reds | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Kashiwa Reysol | 2 | 1 | 0 | 1 | 1 | 0 | 1 | 0 |
 Melbourne Victory | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 |
 Jeonbuk Motors | 2 | 1 | 0 | 1 | 1 | 0 | 0 | 0 |
 Seongnam | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 True Bangkok United | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Gimcheon Sangmu | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Guangzhou Evergrande | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 |
 SCG Muangthong United | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Gangwon | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Selangor | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Jeju United | 2 | 2 | 0 | 0 | 0 | 0 | 1 | 0 |
 Gimpo | 2 | 1 | 0 | 1 | 0 | 0 | 1 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Sweden U17 W | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
Across 5 Premier League appearances in 2025/2026 (406 minutes), Ja-ryong Koo scored 1 goal but did not register an assist — 0.22 goal involvements per 90. By match rating he sits in the top 4% of 33 K League 2 defenders with at least 450 minutes in 2025, while ranking 11th of 33 for goals.
Season ratings peak at 7.04 in 2024, K League 1 and bottom out at 6.74 in 2025.
