| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2016/2017 | Eerste Divisie | 8 | 449 | 4 | 2 | 1.2 | 7.04 |
| 2017/2018 | Eerste Divisie | 20 | 902 | 14 | 0 | 1.4 | — |
| 2018/2019 | Eredivisie | 19 | 1348 | 4 | 0 | 0.27 | 6.9 |
| 2018/2019 | Eerste Divisie | 13 | 773 | 4 | 1 | 0.58 | — |
| 2019/2020 | Ligue 1 | 1 | 13 | 0 | 0 | — | 6.63 |
| 2019/2020 | Eredivisie | 16 | 1048 | 6 | 1 | 0.6 | 7.09 |
| 2020/2021 | Ligue 1 | 24 | 641 | 0 | 1 | 0.14 | 6.72 |
| 2021/2022 | Eredivisie | 18 | 1433 | 4 | 3 | 0.44 | 6.96 |
| 2021/2022 | Ligue 1 | 2 | 80 | 0 | 0 | — | 6.68 |
| 2022/2023 | Ligue 1 | 14 | 208 | 0 | 0 | 0 | 6.73 |
| 2023/2024 | Eredivisie | 31 | 2193 | 12 | 3 | 0.62 | 7.21 |
| 2024/2025 | Eredivisie | 11 | 532 | 1 | 1 | 0.34 | 6.72 |
| 2025/2026 | Eredivisie | 30 | 2001 | 12 | 1 | 0.58 | 7.05 |
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 2026-07-30
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 AZ | 9 | 3 | 1 | 5 | 3 | 1 | 2 | 0 |
 Vitesse | 8 | 5 | 0 | 3 | 4 | 0 | 0 | 0 |
 FC Twente | 8 | 0 | 2 | 6 | 0 | 0 | 2 | 0 |
 Ajax | 8 | 1 | 3 | 4 | 3 | 0 | 2 | 0 |
 FC Utrecht | 8 | 2 | 3 | 3 | 1 | 0 | 0 | 0 |
 Sparta Rotterdam | 7 | 2 | 2 | 3 | 2 | 0 | 0 | 0 |
 Heracles Almelo | 7 | 3 | 2 | 2 | 2 | 1 | 0 | 0 |
 FC Groningen | 7 | 4 | 0 | 3 | 1 | 0 | 0 | 0 |
 Feyenoord | 6 | 1 | 1 | 4 | 0 | 0 | 1 | 0 |
 Nice | 6 | 0 | 6 | 0 | 0 | 0 | 0 | 0 |
 PEC Zwolle | 6 | 2 | 0 | 4 | 2 | 0 | 0 | 0 |
 SC Heerenveen | 6 | 1 | 3 | 2 | 0 | 0 | 1 | 0 |
 Go Ahead Eagles | 5 | 0 | 3 | 2 | 1 | 0 | 0 | 0 |
 PSV | 5 | 0 | 0 | 5 | 3 | 0 | 1 | 0 |
 RKC Waalwijk | 5 | 5 | 0 | 0 | 1 | 1 | 0 | 0 |
 Excelsior | 5 | 3 | 1 | 1 | 4 | 2 | 0 | 0 |
 NEC Nijmegen | 4 | 1 | 1 | 2 | 2 | 0 | 0 | 0 |
 Montpellier | 4 | 1 | 2 | 1 | 0 | 0 | 0 | 0 |
 Willem II | 4 | 4 | 0 | 0 | 3 | 0 | 0 | 0 |
 LOSC Lille | 4 | 1 | 1 | 2 | 0 | 0 | 0 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Belarus U21 | 1 | 1 | 0 | 0 | 3 | 0 | 0 | 0 |
 England U21 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 |
 Germany U21 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 |
 France U21 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Cyprus U21 | 1 | 1 | 0 | 0 | 3 | 1 | 0 | 0 |
 United States U23 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
Across 30 Eredivisie appearances in 2025/2026, Kaj Sierhuis contributed 12 goals plus 1 assist (2,001 minutes) — 0.58 goal involvements per 90. GioScore's computed rating for the season averages 7.05.
2023/2024 stands as his highest-rated season (7.21, Eredivisie), with 2020/2021 the weakest (6.72).
