| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2017/2018 | Eerste Divisie | 13 | 532 | 1 | 1 | 0.34 | — |
| 2018/2019 | Eerste Divisie | 31 | 2085 | 6 | 2 | 0.35 | — |
| 2019/2020 | Eerste Divisie | 21 | 1289 | 1 | 1 | 0.14 | — |
| 2020/2021 | Eerste Divisie | 30 | 1646 | 4 | 4 | 0.44 | 6.82 |
| 2022 | Superettan | 6 | 475 | 1 | 0 | 0.19 | — |
| 2022/2023 | Eerste Divisie | 36 | 3058 | 9 | 19 | 0.82 | 7.27 |
| 2023/2024 | Eerste Divisie | 20 | 1739 | 9 | 5 | 0.72 | 7.42 |
| 2023/2024 | 2. Bundesliga | 17 | 1223 | 4 | 1 | 0.37 | 6.97 |
| 2024/2025 | Pro League | 13 | 393 | 0 | 1 | 0.23 | 6.69 |
| 2024/2025 | 2. Bundesliga | 15 | 944 | 3 | 0 | 0.29 | 6.92 |
| 2025/2026 | Eredivisie | 34 | 2890 | 11 | 6 | 0.53 | 6.97 |
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 2026-07-27
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 AZ | 4 | 1 | 1 | 2 | 3 | 0 | 0 | 0 |
 NAC Breda | 4 | 1 | 1 | 2 | 1 | 0 | 0 | 0 |
 Excelsior | 4 | 0 | 2 | 2 | 2 | 0 | 0 | 0 |
 Sint-Truiden | 3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
 NEC Nijmegen | 3 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
 FC Twente | 3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
 Go Ahead Eagles | 3 | 0 | 0 | 3 | 0 | 0 | 1 | 0 |
 FC Utrecht | 3 | 0 | 1 | 2 | 0 | 0 | 0 | 0 |
 Sparta Rotterdam | 3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
 Telstar | 3 | 2 | 0 | 1 | 5 | 3 | 0 | 0 |
 FC Volendam | 3 | 0 | 1 | 2 | 0 | 0 | 0 | 0 |
 Helmond Sport | 3 | 2 | 1 | 0 | 1 | 0 | 1 | 0 |
 Cercle Brugge | 3 | 1 | 2 | 0 | 0 | 0 | 1 | 0 |
 Hertha BSC | 3 | 1 | 0 | 2 | 0 | 0 | 0 | 0 |
 Schalke 04 | 2 | 0 | 1 | 1 | 1 | 0 | 0 | 0 |
 Darmstadt 98 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Ajax | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 FC Dordrecht | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Nürnberg | 2 | 2 | 0 | 0 | 0 | 0 | 1 | 0 |
 SC Heerenveen | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
Koen Kostons's 2025/2026 Eredivisie season produced 11 goals and 6 assists across 34 appearances (2,890 minutes) — 0.53 goal involvements per 90. His average match rating for that season computes to 6.97.
2023/2024 stands as his highest-rated season (7.42, Eerste Divisie), with 2024/2025 the weakest (6.69).
